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4 years ago

Write the standard equation of a circle with a center (2,-8) and radius 9

Mathematics

1 answer:

Anna11 [10]4 years ago

6 0

The standard equation of a circle:

$(x-h)^2+(y-k)^2=r^2$

(h, k) - center

r - radius

We have:

(2, -8) → h = 2, k = -8

r = 9

Substitute:

$(x-2)^2+(y-(-8))^2=9^2\\\\(x-2)^2+(y+8)^2=81$

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3 years ago

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kiruha [24]

Answer:

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