1 Answer

Masjum · Answer 1 · 2019-02-11T13:26:05+0000

regular decagon has 10 sides so n = 10
interior angle = (n-2) × 180° / n
interior angle = (10-2) x 180 / 10
interior angle = = 8 x 180 / 10
interior angle = = 144

exterior angle = 180 - 144 = 36

answer
36

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