Exterior Angles of Triangle - Definition, Formula, Properties

When any side of a triangle is extended, the angle that is formed with this side and its adjacent side is called the exterior angle of a triangle. There are three exterior angles in a triangle.

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Exterior Angle Theorem - Proof & Examples (Exterior Angle Property of Triangle)

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Triangle Definition in Maths – Explanation, Types, Formula and Solved Examples - Infinity Learn by Sri Chaitanya

Exterior Angles Of A Triangle (video lessons, examples, step-by-step solutions)

Unit 5 Section 6 : Finding Angles in Triangles

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Question Video: The Type of the Exterior Angle of an Isosceles Triangle