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bezimeni [28]
3 years ago
9

In the regual nonagon shown, what is the measure of angle x?

Mathematics
1 answer:
andre [41]3 years ago
4 0
The sum of the interior angles of a polygon is (n-2)*180, n being the number of sides.
a nonagon has nine sides, so the total of interior angles is (9-2)*180=7*180
this is a regular nonagon, so each interior angle has the same degrees:
7*180/9=7*20=140
the exterior angle=180-the interior angle=180-140=40
40 is the correct answer.
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