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Circles An Introduction

The general form for the equation of a circle is (x h)2 (y k)2 = r2.The center of the circle is the ordered pair (h, k).The radius of the circle is r.. For each of the following problems, find the center and radius. 1. (x 3)2 (y 4)2 = 25. 2. (x 1)2 y2 = 44 3. (x

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Circles An Introduction

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    1. Circles – An Introduction SPI 3103.3.11    Graph conic sections (circles, parabolas, ellipses and hyperbolas) and understand the relationship between the standard form and the key characteristics of the graph.

    2. The general form for the equation of a circle is (x – h)2 + (y – k)2 = r2. The center of the circle is the ordered pair (h, k). The radius of the circle is r.

    3. For each of the following problems, find the center and radius. 1. (x + 3)2 + (y – 4)2 = 25

    4. 2. (x – 1)2 + y2 = 44 3. (x + 8)2 + (y + 2)2 = 7

    5. 4. x2 + y2 = 18 5. (x – 7)2 + (y + 2)2 = 0 6. x2 + (y – 4)2 = 44

    6. Write an equation for the circle with the given center and radius. 7. Center (2, –7), radius 4

    7. 8. C = (0, –2), r = 6 9. C = (0, 0), r =

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