Involutes, Continued
Involute of a
triangle
To draw an involute of a triangle, use this table:
Step
Action
1
Given triangle ABC, extend the sides of the triangle to any
convenient length.
2
Using CA as a radius and C as a center, strike arc AD terminating
at the intersection of the extension BD.
3
With BD as a radius and B as a center, strike arc DE.
4
With AE as a radius and A as a center , strike arc EF.
5
Repeat this procedure until you reach a figure of the desired size.
Figure 2-53 is an example of an involute of a triangle.
Figure 2-53.—The involute of a triangle.
Continued on next page
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