What is the sum of the measures of the interior angles of a decagon

Question

10 sided figure

the sum of the interior angles

what are the meaures of the interior angles

Answer 1

Sum of interior angle of polygon = 180(n-2)

Given decagon have 10 sides.

n = 10

Sum of interior angle of decagon = 180(10-2)

= 180*8

= 1440

measure of each interior angle = (n-2)180/n

= (10-2)180/10

= 8*180/10

= 18*8

= 144