what is the measure of one angle in a regular 18-gon? A.2880° B.180° C.160° D.135°
The formula to find the measure of one angle in a regular polygon is:
angle = (180(n-2))/n
where n is the number of sides of the polygon.
So for a regular 18-gon, n = 18:
angle = (180(18-2))/18
angle = 160°
Therefore, the answer is C. 160°.