Question

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


A.


1800°


B.


1620°


C.


1440°


D.


1260°

Answer 1

All sides are the same length (congruent) and all interior angles are the same size (congruent). To find the measure of the angles, we know that the sum of all the angles is 1440 degrees (from above)... And there are ten angles... So, the measure of the angle of a regular decagon is 144 degrees.

Answer 2

decagon is made up of 8 triangles.

Answer 3

so c Is the answer

Answer 4

i dont understand what to do

Answer 5

thank you

Answer 6

here just for answer, i see