Question

One of the angles of a regular decagon is 144°. What is the sum of the measures of all the interior angles of this decagon? A. 930° B. 1240° C. 1440° D. 1800°

Answer 1

The answer would be c. 1440

Explanation:

one of the angels would be 144 so you're gonna have to end up multiplying it by 10 which leads to 1440