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Popular >

area x^2+y^2=81

Solution

area

x^{2} + y^{2} = 81

Solution

A = 81 π

Solution steps

A = π r^{2}

Find the radius

Radius given

x^{2} + y^{2} = 81 : r = 9

A = π 9^{2}

Refine

A = 81 π

Popular Examples

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4 x^{2} + 4 y^{2} - 4 x + 2 y - 1 = 0

area x^2+y^2=4 area

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Frequently Asked Questions (FAQ)

What is the area x^2+y^2=81 ?
The area x^2+y^2=81 is A=81pi