Question

What is the standard form of the equation of a circle with a center of (1, 2) and a diameter of 15?

Answer 1

`=> (x - 1)^2 + (y - 2)^2 = 225`

Explanation:

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

where:
`Center: (h, k)`
`radius = r`

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`(x - 1)^2 + (y - 2)^2 = 15^2`
`=> (x - 1)^2 + (y - 2)^2 = 225`