Question

prove that the interior angles regular angles of a pentagon is 3 times the exterior angles of a regular decagon​

Answer 1

Step-by-step explanation:

Now, each exterior angle of a decagon will be equal to 360n, here n = 10. So, we get an exterior angle of a regular decagon as, 36010=36∘. So, we get that the interior angle of a regular five-sided polygon (pentagon) is three times the exterior angle of a regular decagon. Hence proved.