Theorem 6.8 - Exterior angle is equal to sum interior opposite angles

Same-Side Exterior Angles: Definition & Theorem

Theorem 7.2 - Angle opposite to equal sides of a triangle are equal

Exterior Angle Theorem – Explanation & Examples

Exterior Angle Theorem | Definition, Formula & Examples

Exterior Angle Theorem (examples, solutions, videos, worksheets, activities)

Triangle Sum Theorem – Explanation & Examples

Angle Sum Property Of A Triangle And Exterior Angle Theorem