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determine the diameter of a circle with a radius of 4.26m.

determine the area of the circle with diameter is 8mm.

• math - grade 7 -

d = 2 r

d = 2 * 4.26 = 8.52 m

A = d ^ 2 pi / 4

A = 8 ^ 2 pi / 4

A = 64 pi / 4

A = 16 pi mm ^ 2

A = 16 * 3.14 = 50.24 mm ^ 2

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