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
A 7-sided polygon has angles 135°, 124°, 125°, 129°, 124°, 124° and x°. Find x.
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Question 2
What is each interior angle of a regular decagon? Round to 1 decimal place if needed.
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Question 3
What is the sum of the interior angles of a pentagon (5 sides)?
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Question 4
A 8-sided polygon has angles 139°, 130°, 133°, 133°, 135°, 139°, 129° and x°. Find x.
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Question 5
What is each interior angle of a regular octagon? Round to 1 decimal place if needed.
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Question 6
What is the sum of the interior angles of a nonagon (9 sides)?
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Question 7
A 7-sided polygon has angles 125°, 133°, 130°, 133°, 126°, 133° and x°. Find x.
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Question 8
What is each interior angle of a regular decagon? Round to 1 decimal place if needed.
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Question 9
What is the sum of the interior angles of a nonagon (9 sides)?
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Question 10
A 6-sided polygon has angles 117°, 121°, 118°, 114°, 121° and x°. Find x.
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Question 11
What is each interior angle of a regular octagon? Round to 1 decimal place if needed.
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Question 12
What is the sum of the interior angles of a octagon (8 sides)?
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Question 13
A 5-sided polygon has angles 104°, 106°, 106°, 111° and x°. Find x.
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Question 14
What is each interior angle of a regular dodecagon? Round to 1 decimal place if needed.
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Question 15
What is the sum of the interior angles of a pentagon (5 sides)?
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Question 16
A 8-sided polygon has angles 132°, 133°, 132°, 135°, 129°, 137°, 141° and x°. Find x.
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