Videos, worksheets, games and acivities to help Geometry students learn about the angle sum of a triangle.

Triangle Angle Sum
The sum of the three angles in any triangle sum to 180 degrees. The importance of this fact in Geometry cannot be emphasized enough. The triangle angle sum theorem is used in almost every missing angle problem, in the exterior angle theorem, and in the polygon angle sum formula.

Angle Sum of a Triangle

Angles of a Triangle - Triangle Sum Theorem
Students learn the triangle sum theorem, which states that the sum of the measures of the angles of a triangle is 180 degrees. Students are then asked to solve problems related to the triangle sum theorem using Algebra.

Geometry Word Problems - Angles of a Triangle

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