184 Section 2 Drafting Techniques and Skills
5. Specify the radius. The radius is equal
to half the distance across the corners.
If you move the cursor, the hexagon is
drawn dynamically. Enter coordinates to
specify the radius and direction, or use
direct distance entry.
6. The hexagon is generated automatically.
Refer to Figure 6-32C.
Figure 6-32. Constructing a hexagon when the distance across the corners is known. The hexagon can be
drawn with two parallel fl ats in a horizontal position or in a vertical position.
Distance
across corners
60–
A B
Distance
across corners
C D
60–
30– 30–
Construct a
Hexagon with
the Distance across the
Corners Given
CAD
Using a Compass and Triangle
(Manual Procedure)
1. With a compass, draw a circle equal
in diameter to the distance across the
corners given, Figure 6-32A.
2. With a T-square and a 30°-60° triangle,
draw 60° diagonal lines across the center
of the circle, Figure 6-32B.
3. With the T-square and triangle, join the
points of intersection of the diagonal
lines with the circle. This forms the
required hexagon, Figure 6-32C. An
alternate construction for the hexagon
using the distance across the corners is
shown in Figure 6-32D.
Using the Polygon Command
(CAD Procedure)
1. The distance across the corners is given.
Refer to Figure 6-32A.
2. Enter the
Polygon
command and specify
the number of sides as six.
3. Specify a center point for the hexagon.
4. Enter the
Inscribed
option.
An octagon is a polygon with eight sides.
A regular octagon has eight equal sides and
eight equal interior angles. An octagon can
be constructed based on the distance across
the flats or the distance across the corners. A fl
45° triangle is used with each method. The
following procedure uses the distance across
the flats to construct an octagon. fl
1. With a compass, draw a circle equal in
diameter to the distance across the flats, fl
Figure 6-33A.
2. With a T-square and a 45° triangle, draw
the eight sides tangent to the circle,
Figure 6-33B.
Construct an Octagon
with the Distance
across the Flats Given
Using the Circle Method
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