Interior angles of polygons
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
What is the sum of the interior angles of a decagon (10 sides)?
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Question 2
What is each interior angle of a regular dodecagon? Round to 1 decimal place if needed.
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Question 3
A 8-sided polygon has angles 135°, 136°, 133°, 137°, 137°, 135°, 137° and x°. Find x.
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Question 4
What is the sum of the interior angles of a nonagon (9 sides)?
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Question 5
What is each interior angle of a regular hexagon? Round to 1 decimal place if needed.
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Question 6
A 5-sided polygon has angles 109°, 104°, 107°, 114° and x°. Find x.
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Question 7
What is the sum of the interior angles of a nonagon (9 sides)?
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Question 8
What is each interior angle of a regular octagon? Round to 1 decimal place if needed.
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Question 9
A 6-sided polygon has angles 122°, 115°, 119°, 119°, 126° and x°. Find x.
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Question 10
What is the sum of the interior angles of a pentagon (5 sides)?
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Question 11
What is each interior angle of a regular decagon? Round to 1 decimal place if needed.
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Question 12
A 8-sided polygon has angles 133°, 132°, 139°, 141°, 137°, 138°, 139° and x°. Find x.
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Question 13
What is the sum of the interior angles of a nonagon (9 sides)?
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Question 14
What is each interior angle of a regular hexagon? Round to 1 decimal place if needed.
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Question 15
A 6-sided polygon has angles 114°, 115°, 117°, 123°, 115° and x°. Find x.
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Question 16
What is the sum of the interior angles of a dodecagon (12 sides)?
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