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Exterior Angle of a Triangle | Passys World of Mathematics - Free Printable

Educational worksheet: Exterior Angle of a Triangle | Passys World of Mathematics. Download and print for classroom or home learning activities.

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- The interior angles of the triangle are 60°, 70°, and 50°.
- An exterior angle is formed by extending one side of the triangle, creating a straight line (180°) with the adjacent interior angle.
- Exterior Angle A is adjacent to the 60° interior angle, so it is calculated as 180° - 60° = 120°.
- Exterior Angle B is adjacent to the 70° interior angle, so it is calculated as 180° - 70° = 110°.
- Exterior Angle C is adjacent to the 50° interior angle, so it is calculated as 180° - 50° = 130°.
- The sum of the three exterior angles is 120° + 110° + 130° = 360°.

Parent Tip: Review the logic above to help your child master the concept of exterior angles of triangles worksheet.

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