Polygonal Construction, Continued
Triangles
You may use an alternate method of constructing triangles if triangles and
(Continued)
protractors are not available.
To draw an equilateral triangle using an alternate method of construction, use
this table:
Step
Action
1
Draw straight line AB the length of the base of your equilateral
triangle.
2
Using the length of AB as a radius, strike an arc with A and with B
as a center.
3
4
These arcs will intersect at C.
Draw straight lines from A to C and B to C to complete the
triangle.
Figure 2-39 illustrates the process for constructing an equilateral triangle
with an alternate method.
Figure 2-39.—Using a compass to
construct an equalateral triangle.
Continued on next page
2-40
