Exterior angles of a triangle. Mathematics State Board, Class 7: lessons, tests, tasks.

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1.	Exterior angle of a polygon
2.	Forms of exterior angles of a triangle
3.	Exterior angle property of a triangle

1.	Calculate the exterior angle Difficulty: easy	2
2.	Determine the exterior angle of right triangle Difficulty: easy	3
3.	Evaluate interior and exterior angles of a triangle Difficulty: medium	4
4.	Determine the angle in isosceles triangle Difficulty: medium	4
5.	Evaluate the unknown value Difficulty: medium	4
6.	Calculate the unknown angles Difficulty: hard	5
7.	Estimate the unknown value Difficulty: hard	5

Training test

Difficulty: medium

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Exterior angles of a triangle