Use the exterior angle of a triangle
8th grade (Year 9 in England) · 16 questions · Common Core: 8.G.A.5 · England: KS3 Geometry and measures, GCSE Foundation Geometry and measures
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Question 1
An exterior angle of a triangle is 61°. One of the two opposite interior angles is 25°. Find the other opposite interior angle.
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Question 2
In a triangle the two opposite interior angles are (x + 6)° and (2x + 14)°. The exterior angle is 65°. Find x.
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Question 3
An exterior angle of a triangle is 95°. One of the two opposite interior angles is 35°. Find the other opposite interior angle.
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Question 4
In a triangle the two opposite interior angles are (x + 12)° and (2x + 2)°. The exterior angle is 50°. Find x.
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Question 5
An exterior angle of a triangle is 119°. One of the two opposite interior angles is 30°. Find the other opposite interior angle.
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Question 6
In a triangle the two opposite interior angles are (x + 20)° and (2x + 5)°. The exterior angle is 58°. Find x.
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Question 7
An exterior angle of a triangle is 60°. One of the two opposite interior angles is 39°. Find the other opposite interior angle.
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Question 8
In a triangle the two opposite interior angles are (x + 17)° and (2x + 8)°. The exterior angle is 61°. Find x.
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Question 9
An exterior angle of a triangle is 147°. One of the two opposite interior angles is 69°. Find the other opposite interior angle.
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Question 10
In a triangle the two opposite interior angles are (x + 16)° and (2x + 13)°. The exterior angle is 110°. Find x.
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Question 11
An exterior angle of a triangle is 107°. One of the two opposite interior angles is 66°. Find the other opposite interior angle.
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Question 12
In a triangle the two opposite interior angles are (x + 19)° and (2x + 9)°. The exterior angle is 64°. Find x.
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Question 13
An exterior angle of a triangle is 85°. One of the two opposite interior angles is 26°. Find the other opposite interior angle.
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Question 14
In a triangle the two opposite interior angles are (x + 16)° and (2x + 13)°. The exterior angle is 98°. Find x.
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Question 15
An exterior angle of a triangle is 98°. One of the two opposite interior angles is 67°. Find the other opposite interior angle.
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Question 16
In a triangle the two opposite interior angles are (x + 8)° and (2x + 9)°. The exterior angle is 74°. Find x.
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