November 10, 2008

This resource has been contributed by Winpossible, and can also be accessed on their website by clicking here - Triangle Angle-Sum Theorem.

In this mini-lesson you'll learn the triangle angle-sum theorem and how to prove it. Further it will provide homework help from given problems with solution. The angle-sum theorem states that the sum of the measures of the interior angles of a triangle is 180°. In triangle*ABC* , m*A* + m*B* + m*C* = 180°. For example, if in a triangle, m*B* = 90°, and m*C* = 40°, then the measure of m*A* is 50°.

In this mini-lesson you'll learn the triangle angle-sum theorem and how to prove it. Further it will provide homework help from given problems with solution. The angle-sum theorem states that the sum of the measures of the interior angles of a triangle is 180°. In triangle

This FREE mini-lesson is a part of Winpossible's online course that covers all topics within Geometry. Click on the video below to go through it. If you like it, you can buy our online course in Geometry by clicking here.

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