Common Core 7.G.B.4 worksheet

Question 1

A semicircle has diameter 22 cm. Find its perimeter (curved part + straight edge), to 1 decimal place.

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Question 2

A circle has radius 3 m. Find its area in m², rounded to 1 decimal place. (Use the π key.)

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Question 3

A circular lawn sprinkler waters everything within 12 m of it. What area does it water, in m², to the nearest whole number?

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Question 4

A circle has diameter 10 ft. Its area is kπ ft². What is k?

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Question 5

A circle has radius 14 cm. Give its circumference in terms of π: it is kπ cm. What is k?

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Question 6

What is the name for the distance all the way round the circle?

• A. radius
• B. diameter
• C. circumference

Question 7

What is the area of a quarter circle with radius 8 yd? Round to 1 decimal place.

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Question 8

A circle has a diameter of 16 cm. What is its radius?

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Question 9

A 30 cm pizza and a 38 cm pizza have the same thickness. How many times as much pizza is in the larger one? Round to 2 decimal places.

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Question 10

A circle has diameter 22 m. What is its radius, in m?

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Question 11

A circle has circumference 52π cm. What is its diameter, in cm?

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Question 12

A window is a 10 dm by 6 dm rectangle with a semicircle on top (the semicircle's diameter is the 10 dm side). Find the total area of glass in dm², to 1 decimal place.

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Question 13

Find the area of a semicircle with radius 14 cm, to 1 decimal place.

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Question 14

A bike wheel has diameter 70 cm. How far does the bike travel, in metres, when the wheel turns 76 times? Round to 1 decimal place.

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Question 15

2 identical coins of radius 2 mm are placed in a row, touching. How long is the row?

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Question 16

A circle has radius 6 m. Find its circumference in m. Use π ≈ 3.14159 (your calculator's π) and round to 1 decimal place.

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