Question

What is the measure of an exterior angle of a regular 7-sided polygon? The answer must be a decimal.

Answer 1

1 interior angle = [(n-2)180]÷n
= [(7-2)×180]÷7
= 900÷7 = 128.57 °
an exterior angle = 180 - interior
= 180-128.57
= 51.43°