60o
Angles in a triangle sum to 180o
With 3 angles all the same each one is 180o ÷ 3 = 60o
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Providing that it is a regular polygon then each exterior angle will measure 12 degrees
(180 - 78) / 2...
Each of the interior angles of an equilateral triangle is 120 degrees.
Each exterior angle is 45 degreesEach interior angle is 135 degrees135 degrees.
How many sides does a regular polygon have if the measure of each interior angle is equal to 172 degress ?