Polygonal Construction, Continued
Angles
(Continued)
SINE METHOD: The sine method of angle construction is another
trigonometric function of the acute angle that is the ratio of the opposite side
to the hypotenuse of a right triangle. Draw line x to any convenient length,
again we will use 10. Find the sine of angle
in a table of natural sines,
multiply by 10, and strike R= 10 sin
.
Draw the other side of the angle
tangent to the arc.
Figure 2-35 is an angle drawn by the sine method.
Figure 2-35.—The sine method of angle construction.
Continued on next page
2-36
