Find an angle with the cosine rule
11th grade (Year 12 in England) · 16 questions · Common Core: HSG.SRT.D.11 · England: GCSE Higher Geometry
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Question 1
A triangle has sides a = 10, b = 13 and c = 10 cm. Find angle A (opposite a) to 1 decimal place.
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Question 2
A triangle has sides 8 cm, 9 cm and 5 cm. Find its largest angle to 1 decimal place.
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Question 3
A triangle has sides a = 8, b = 11 and c = 8 cm. Find angle A (opposite a) to 1 decimal place.
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Question 4
A triangle has sides 10 cm, 13 cm and 8 cm. Find its largest angle to 1 decimal place.
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Question 5
A triangle has sides a = 13, b = 9 and c = 10 cm. Find angle A (opposite a) to 1 decimal place.
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Question 6
A triangle has sides 8 cm, 11 cm and 8 cm. Find its largest angle to 1 decimal place.
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Question 7
A triangle has sides a = 14, b = 14 and c = 6 cm. Find angle A (opposite a) to 1 decimal place.
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Question 8
A triangle has sides 12 cm, 14 cm and 11 cm. Find its largest angle to 1 decimal place.
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Question 9
A triangle has sides a = 6, b = 6 and c = 4 cm. Find angle A (opposite a) to 1 decimal place.
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Question 10
A triangle has sides 8 cm, 10 cm and 4 cm. Find its largest angle to 1 decimal place.
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Question 11
A triangle has sides a = 14, b = 7 and c = 14 cm. Find angle A (opposite a) to 1 decimal place.
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Question 12
A triangle has sides 8 cm, 11 cm and 7 cm. Find its largest angle to 1 decimal place.
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Question 13
A triangle has sides a = 4, b = 6 and c = 8 cm. Find angle A (opposite a) to 1 decimal place.
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Question 14
A triangle has sides 7 cm, 7 cm and 4 cm. Find its largest angle to 1 decimal place.
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Question 15
A triangle has sides a = 6, b = 7 and c = 7 cm. Find angle A (opposite a) to 1 decimal place.
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Question 16
A triangle has sides 9 cm, 14 cm and 6 cm. Find its largest angle to 1 decimal place.
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