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Circles & Circumference Standard Math

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The circumference is the distance around a circle. Circumference Circumference is the perimeter of circles. Radius is half of the diameter. BACK

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Find the Circumference of the circle. BACK

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Find the circumference using the diameter. BACK

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Find the circumference of the circle. You try this one. BACK

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How would you find the diameter of a circle if you were only given the circumference? Find the diameter of a circle that has a circumference of 66. BACK

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The circumference is the distance around a circle. diameter 1230.1 What is the connection between the diameter and the circumference? circumference The symbol, , is said as pie, and is about 3.14 The connection between the circumference and the diameter is

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Find the diameter of the circle below: How to find the diameter given the circumference If you have the circumference: divide the circumference by 3.14 ( ). State the formula Substitute the values for and C.

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Find the circumference of the circle below: How to find the radius given the circumference If you have the circumference: divide this by, , 3.14 first to get the diameter. State the formula Substitute the values for and C. Then divide the diameter by 2.

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Calculate the missing numbers in the table below using the circumference formula below. What’s the formula? 17.584 14.13 5 C (cm)d (cm)r (cm) Use 3.14 as an approximation for . 10 4.5 5.6 2.8 2.25 31.4

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Plenary You should now be able to find the radius or diameter of a circle given the circumference. You should know and use the formula for the circumference of a circle. or Find the diameter of the circle below.

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Circles & Circumference Standard Math BACK

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