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| Math Central | Quandaries & Queries |
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Find an equation of the circle that satisfies the stated conditions. Center C(4,-1), tangent to the x-axis |
Hi Kiera,
The equation of a circle with radius r and centre (h, k) is (x - h)2 + (y - k)2 = r2.
A tangent to a circle at a point on the circle is perpendicular to the radius at the same point.
What is the perpendicular distance from the centre to the X-axis? What is the radius of the circle?
Penny
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