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The sum of the interior angles of any triangle

Lesson 6 / 16

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Lesson outcome

I can demonstrate and prove that in a triangle, the sum of the interior angles is 180°.

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By considering a number of different triangles you can demonstrate facts about the angles in triangles. The interior angles of any triangle sum to 180° The angle sum of triangles can be proved using angles in parallel lines.

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This content is by Cashar and published under an open licence.