A picture frame is shaped as a heptagon. The measure of one angle is 144°. The remaining interior angles are congruent. What is the measure of each remaining interior angle in the picture frame?
126
180
174
150

Question

A picture frame is shaped as a heptagon. The measure of one angle is 144°. The remaining interior angles are congruent. What is the measure of each remaining interior angle in the picture frame? 
126
180
174
150

anonymous · Answer

heptagon = 7 sides
find the total sum of angles in the shape
180(n-2) = 180 * 5 = 900
subtract 144 from 900 

then 6x = 756
x= 126