Area of a ring: a circle inside a circle
Subtract the area of the small circle from the area of the large circle. Use π = 3.14.
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A circular pond with a radius of 1 m sits inside a circular lawn with a radius of 6 m. What is the area of the grass around the pond, in m²? Use π = 3.14.
Answer: 109.9
A circular pond with a radius of 1 m sits inside a circular lawn with a radius of 4 m. What is the area of the grass around the pond, in m²? Use π = 3.14.
Answer: 47.1
A circular pond with a radius of 5 m sits inside a circular lawn with a radius of 16 m. What is the area of the grass around the pond, in m²? Use π = 3.14.
Answer: 725.34
Tip: Subtract the area of the small circle from the area of the large circle. Use π = 3.14.
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