Asked by Boberto

Write the equation of each circle.

Center at (-1,8) passes through (9,3)

Answers

Answered by Reiny
easiest way:
centre is (-1,8) , so the equation is

(x+1)^2 + (y-8)^2 = r^2
sub in the given point (9,3)
r^2 = 10^2 + (-5)^2 = 125

(x+1)^2 + (y-8)^2 = 125

Answered by Boberto
thanks reiny
Answered by Anonymous
Write an equation for a circle with center at (–8, 4) and diameter 2.
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