Find the area and circumference of circles in terms of pi
Circumference is 2πr; area is πr². Leave π in the answer.
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A circle has a diameter of 56 cm. What is its circumference? Write it as a multiple of π, like 10π.
Answer: 56π
A circle has a radius of 20 cm. What is its circumference? Write it as a multiple of π, like 10π.
Answer: 40π
A circle has a diameter of 26 cm. What is its circumference? Write it as a multiple of π, like 10π.
Answer: 26π
Tip: Circumference is 2πr; area is πr². Leave π in the answer.
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