Exterior Angle of a Triangle – Definition, Theorem, Proof, Examples

What is the exterior angle of a triangle & how to find it. How many of them are found in a triangle. Learn the exterior angle theorem with proof and examples

Section 1.2

Exterior Angle Theorem - Definition, Proof, Examples

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Proof: The Exterior Angles Theorem

Exterior Angle Theorem - Formula & Examples

4.1 Proving Triangle Exterior Angle Theorem

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