Chapter 2.4, Problem 23E

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6th Edition

Daniel C. Alexander + 1 other

ISBN: 9781285195698

Textbook Problem

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Consider any triangle and one exterior angle at each vertex. What is the sum of the measures of the measures of the three exterior angle of the triangles?

To determine

**To find:**

The sum of the measures of three exterior angles of the triangle.

Explanation

Consider the following triangle.

Figure

**Calculation:**

Equate the sum of all three angles of triangle to

Equate the exterior of a triangle is to the sum of the measures of two non-adjacent interior angles.

Add equation

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