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>> Chapter 24, creating

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solids and editing
in two dimensional.

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In this chapter,
we are working

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on creating basic
geometric shape,

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drawing extrude,
sweep, revolved,

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lofted and
polyline solids,

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manipulating
solid directly,

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creating a mesh shape.

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Drawing a basic
smooth solid,

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AutoCAD make it easy to

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create the most basic

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two dimensional
geometric shape.

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These shapes are easy
to draw because you can

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dynamically see the result

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as you draw like
this solid box.

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To draw the box,
follow these steps.

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Choose Home tab,
modeling panel to

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this solid
drop-down menu box

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at the specifying
first corner.

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Specify any corner of

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the box or right click
and choose a center,

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we are going to continue
with the corner.

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If you specify the corner,

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you see the specifying
other corner.

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Going back to AutoCAD,

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raising surfaces,

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changing the workplace
to 2D modeling.

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Under Home tab,
modeling box,

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choose a box, select
the first corner,

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second corner,
give a height.

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Drawing wedge.

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Wedge is a box slide
diagonally in half.

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The prompts are virtually

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the same as for
the box command,

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as is shown in
this figure.

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To create a wedge,
follow these steps.

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Choose Home tab,
modeling panel,

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3D solid drop-down menu,

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wedge at the specifying
first corner,

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specify any corner
of the wedge.

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If you specify the corner,

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you then see the specified
the other corner.

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And then if you
specify the corner,

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asking you to
specify the slope,

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going back to AutoCAD,

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home tab modeling
panel wedge,

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specify first corner,
specify second corner,

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and give the height
for the slope.

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One more time.

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Drawing cone,

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you can draw a cone with

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a circle or
elliptical base.

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By specifying the
negative height,

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you can create the
inverted cone,

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like the examples here.

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Follow these steps
to draw a cone.

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Choose Home tab,

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modeling panel, 3D
solid drop-down cone.

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At the specifying
center point,

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specify the center of

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the base if you want
to the circle cone.

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Otherwise, you can
use three point,

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two point tangent
r or radius option

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to define the circle base.

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Use the elliptical option

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to define elliptical base.

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At the specifying height,

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specify the height by

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dragging or
entering a value.

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Cone, center point of

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the circle and
specify height.

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Drawing sphere.

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Spheres are not used
very often alone,

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but they can be
the basic basis

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for more complex model.

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They centrally
look pretty.

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Figure 24.5 shows
two solid spheres.

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The left spheres use

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the default isolines
value of four,

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the right sphere use

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a isoline value of eight.

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The isoline
system variable

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controls a number of

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isolines that
are displayed

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on the curve three
dimensional solid.

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Isolines cannot
be snapped.

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Two, but are a help
visualizing eight.

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For more information, you

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can check Chapter 22.

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To draw a sphere,
follow these steps.

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Choose a Home tab,

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modeling panel, 3D,

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drop-down menu sphere at

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the specifying
center point,

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specify center
of the sphere.

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If you want the
sphere to lie

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on the xy plane,

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the z-coordinate
of the center

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should be equal to the
radius of the sphere.

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Use a two point,

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three point or
Tangent option

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to define a circle

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at the center
of the sphere.

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At the sphere
radius, prompt,

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drag and pick a
point on the surface

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of the sphere or

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enter a value
for the radius.

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You can use a
diameter option

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to specify the diameter.

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Sphere, center, and

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the radius.
Drawing cylinder.

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Cylinders are very common

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in two dimensional
motoring,

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both in building models
and creating a holes.

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Figure 24, it's
going to be next

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page shows three
solid cylinders.

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The grid helps you to
visualize the xy plane.

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You can draw a
cylinder with

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a circle or
elliptical base

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by specifying the center

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of the top of the
cylinder sphere.

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You can draw it
at an angle.

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Follow the steps to
draw a cylinder.

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Choose a Home tab,

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modeling panel 3D

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solid drop-down
menu cylinder,

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a specifying point,

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specify center point
of the circle,

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or define the circle
by using a two point,

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three point or
Tangent option.

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You can also choose

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elliptical
option to define

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an ellipse as a base

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at the specifying height,

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specify height by dragging

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entering value or using
a two point options.

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Drawing a torus. A torus

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is a solid three
dimensional doughnut,

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as shown in the
next page picture,

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with a part of a
torus labeled,

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you can make some
unusual shape

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by varying the torus
and tube radius.

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If the torus radius
is negative and

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the tube radius
is larger than

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the obvious value of
the torus radius,

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for example, -2 and three,

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you create a lemon
or football shape.

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If the tube
radius is larger

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than the torus radius,

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you create the
puckered ball

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or apple shape to

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create a torus
follows the steps.

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Choose Home tab,
modeling panel 3D solid

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drop down torus at

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the specifying
center point.

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Specify center of a torus.

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You can use a two point,

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three point or
Tangent option.

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To define the
circle as the basis

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in the torus at the
specifying radius,

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specify the radius of

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the entire torus on

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the diameter option
to specify diameter.

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At the specifying
the radius,

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specify the radius
of just the tube

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or use a diameter option

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to specify the
tube diameter.

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You can use the two
point option to pick

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two points that define
the tube radius.

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That's a torus.

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Do you want
apple or lemon?

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Apple.

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And another torus.

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Torus radius two
tube radius three.

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Drawing panel pyramid, you

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can draw a pyramid
with the bases

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of 3-32 sides.

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The prompts for
the base are

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similar to the prompts

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of the polygon command.

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A pyramid can
come to point or

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you can truncate it.

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You can also tilt
the pyramid,

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as shown in this figure.

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So follow the steps
to draw a pyramid.

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Home tab,
modeling panel 3D

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solid drop down pyramid.

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The default number
of side is listed

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as well as whether
the base will

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be inscribed or
circumscribed

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at the specified
center point,

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specify the center
of the base.

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You can use the
edge option or

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a side option at the
specifying radius,

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drag to specify the radius

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enter or enter a value.

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You can use the inscribed

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option to change
the whether

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the radius is inscribed,
or circumscribed.

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At the specifying height,

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drag to specify the
height to enter a value,

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use a two point
option to specify

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the height by
picking two points.

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Use the axis endpoint
to specify the tip.

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If it's not directly
over the basis,

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center, you tilt
the pyramid,

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use the top radius to
truncate the pyramid,

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drag or enter a value of

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the tops radius and

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then enter the height
of the pyramid.

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Next video is going
to follow with

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the steps drawing
basic 3D solid.

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So find the file
ab24-a. Thank you.