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A diameter of a circle has endpoints of (-5,6) and (-5,-2) what is the equation of this circle?

User Xxg
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1 Answer

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Answer: (x + 5)² + (y - 2)² = 16

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Find Diameter
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Diameter = 6 - (-2) = 8

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Find Radius
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Radius = Diameter ÷ 2
Radius = 8 ÷ 2
Radius = 4

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Find centre of the circle
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x coordinate = -5,
y coordinate = 6 - 4 = 2
Centre of the circle = (-5, 2)

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Formula for Equation of the circle
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(x – h)² + (y – k)² = r²

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Equation of the circle
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(x + 5)² + (y - 2)² = 4²
(x + 5)² + (y - 2)² = 16

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Answer: (x + 5)² + (y - 2)² = 16
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User Xiuyi Yang
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