Question

One angle of an octagon is 100° and all other seven angles are equal. what is the measure of each one of the equal angles.

Answer 1

((2*8) - 4 )90
12*90
= 1080

then 
100+7n = 1080
n = 980/ 7 
= 140 ans .



BRAINLIEST DE DIYO  

Answer 2

Answer:

good answer-

sum of all interior angle= (2×n - 4)

= (2×8- 4)90.

= 12×90.

=1080

THEN,

one angle of octagon= 100°

other angles= 7

=100 +7n=1080

=n= 980/7 = 140°