Since an equilateral triangle is also equiangular, all the angles have to be congruent. Because all the angles must also add up to 180 degrees, each angle is 60 degrees.
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each measure of the angle at point h has a measure of
Providing that it's a regular decagon then each exterior angle will measure 36 degrees
Each interior angle is 140 degrees. Each exterior angle is 220 degrees.
Each interior angle is 157.5
60 degrees