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.

Equilateral Triangle, Definition, Properties & Measurements - Lesson

Interior & Exterior Angles of a Triangle, Overview & Examples - Lesson

Properties of a Triangle - Formulas, Theorems, Examples

Isosceles Triangle - Definition, Angles, Properties, Examples

Unit 5 Section 6 : Finding Angles in Triangles

What is the Exterior Angle Theorem? - Alternate Triangle Calculation Guide

Properties of Triangle - types & formulas [Video & Practice]

Exterior Angle of a Triangle Passy's World of Mathematics

Alternate Exterior Angles, Definition, Theorem & Examples - Lesson

Centroid of a Triangle: Formula, Derivation, Properties, Example

Exterior angle property of a Triangle, Proof of exterior angle theorem

Exterior and Interior Angles of Triangles: Concepts, Videos and Examples