Answer:
120 degrees
Step-by-step explanation:
interior angle of regular polygon = [ ( n − 2 ) × 180 ] / n
n = number of sides
hence, in b), n = 6
interior angle of regular polygon = [ ( 6 − 2 ) × 180 ] / 6 = 120
Pythagorean Theorem A2+B2=C2
625=25+C2
600=C2
Square root of 2 each side
10 Square root of 6 Or 24.494897