The center of a circle is located at C(4,9). Its circumference is 36*pi. What is the DIAMETER of the circle described above?

What is the RADIUS of the circle described above? *

Write the equation of the circle described above.

Diameter = 36

Radius = 18

Equation is (x - 4)² + (y - 9)² = 18²

Step-by-step explanation:

circumference = πd

36π = πd

divide both sides by π

d = 36

Radius = d/2

r = 36/2 = 18

Standard form is

(x - h)² - (y - k)² = r²

(h, k) is the center and r is the radius

Using (h, k) = (4, 9) and r = 18

(x - 4)² + (y - 9)² = 18²

the answer is here: : )

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