3 years ago

Write the standard equation of the circle with center (-3, 5) and a diameter of 18.

1 answer:

4 0

The equation of a circle with center (h, k) and radius r is

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

A diameter of 18 means a radius of 9.

(x + 3)^2 + (y - 5)^2 = 81

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