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1. |
Find an equation of the circle whose center is at (-2, 4) and has radius 5. |
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A. |
(x - 2)2 + (y + 4)2 = 5 |
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B. |
(x + 2)2 + (y - 4)2 = 5 |
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C. |
(x + 2)2 + (y - 4)2 = 25 |
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D. |
(x - 2)2 + (y + 4)2 = 25 |
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Hint |
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2. |
Find an equation of a circle if the endpoints of a diameter are at (-2, -3) and (1, 7). |
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A. |
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B. |
(x - 1)2 + (y - 7)2 = 109 |
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C. |
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D. |
(x + 2)2 + (y + 3)2 = 109 |
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Hint |
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3. |
Find the coordinates of the center of a circle with equation
x2 + y2 - 2x + 8y + 13 = 0. |
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A. |
(1, -4) |
B. |
(1, 4) |
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C. |
(-1, 4) |
D. |
(-1, -4) |
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Hint |
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4. |
Write the equation  in standard form. |
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A. |
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B. |
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C. |
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D. |
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Hint |
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5. |
Which of the following could be the center of a circle that is tangent to the lines y = 3 and x = –2? |
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A. |
(2, 1) |
B. |
(0, 0) |
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C. |
(-3, 1) |
D. |
(2, -1) |
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Hint |
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