all angle of a teddy side polygon are equal to how much is its each inner angle
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The measures of the ten congruent interior angles provide us with ten congruent exterior angles. To help justify that each of the exterior angles is 36∘ , imagine the decagon’s radius dilating towards the center. The sum of the measures of the 10 congruent exterior angles is 360∘ .
So, the exterior angles are 36∘ , how does that help us determine the measures of each of the interior angles? Recall a linear pair of angles are supplementary, (i.e. the sum of their angles is 180∘ .
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