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In this problem, we are going to use the formula for a circle written in standard form.
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The circle has two main parts in this formula.
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One being the center.
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And the center is written in the form h comma k.
00:20
It's an xy ordered pair.
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The other part from this formula will be the radius.
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And the radius is the distance.
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That's an r, by the way.
00:29
The radius will be the distance from the center to any point on the circle.
00:33
So for our equation, our center is negative 1, 2, and a radius is the square root of 7.
00:48
So into our formula, we're going to leave a space to fill in for h, for k, and r...