Exterior Angle Property Worksheet
Explore and apply the exterior angle property of triangles with this Grade 10 math worksheet, featuring multiple-choice, fill-in-the-blank, and short answer questions.
Includes
Standards
Topics
Exterior Angle Property
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Date:
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Read each question carefully and answer to the best of your ability. Show all your work for short answer questions.
1. In a triangle, an exterior angle is equal to the sum of which two angles?
Adjacent interior angles
Vertically opposite angles
Interior opposite angles
All three interior angles
2. If the two interior opposite angles of a triangle are 60° and 75°, what is the measure of the exterior angle?
15°
135°
105°
180°
3. The sum of the interior angles of a triangle is always degrees.
4. An exterior angle and its adjacent interior angle form a pair.
5. In the triangle below, find the value of x.
Show your work:
6. A triangle has interior angles measuring 45°, 65°, and 70°. What are the measures of its three exterior angles?
7. The exterior angle property is only applicable to right-angled triangles.
True
False
8. The sum of an exterior angle and its adjacent interior angle is 180°.
True
False
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