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Home > CCG > Chapter 9 > Lesson 9.2.2 > Problem 9-84

9-84.

Which has greater measure: an exterior angle of an equilateral triangle or an interior angle of a regular heptagon (-gon)? Show all work. Homework Help ✎

Remember that the sum of all exterior angles is equal to .

for each exterior angle, since it is an equilateral triangle.

Measure of one interior angle 

Substitute for and determine which of the two angles has a greater measure.