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vaieri [72.5K]
3 years ago
9

What is the angle of rotation of this regular decagon? What is the measure of an interior angle?

Mathematics
1 answer:
SCORPION-xisa [38]3 years ago
7 0
A decagon has 10 sides. If the polygon is symmetrical, the angle of rotation is given by the following equation:

360 / (number of sides)

Therefore, 

360 = 10 = 36.

The interior angles are determined by the following equation:

180 - (angle of rotation)

Therefore, 

180 - 36 = 144

The answer is A.
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