Circle

1. A.
   $5$
2. B.
   $5\sqrt{2}$
3. C.
   $\dfrac{5}{\sqrt{2}}$
4. D.
   $\dfrac{5}{2}$

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1. A.
   $x^2 + y^2 - 6x + 9 = 0$
2. B.
   $x^2 + y^2 - 6x - 9 = 0$
3. C.
   $x^2 + y^2 - 6x + 3 = 0$
4. D.
   $x^2 + y^2 - 6x - 3 = 0$

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1. A.
   $(2,\ 2)$
2. B.
   $(\sqrt{2},\ \sqrt{6})$
3. C.
   $(2\sqrt{2},\ 0)$
4. D.
   $(\sqrt{6},\ \sqrt{2})$

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1. A.
   $20$
2. B.
   $4$
3. C.
   $5$
4. D.
   $\dfrac{19}{2}$

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1. A.
   $(1, 0)$
2. B.
   $(0, -2 + \sqrt{3})$
3. C.
   $(-1, -2)$
4. D.
   $(-\sqrt{3} + 1, -1)$

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1. A.
   0
2. B.
   3
3. C.
   2
4. D.
   4

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1. A.
   $x = 2 + 5\cos\theta, y = 3 + 5\sin\theta$
2. B.
   $x = -2 + 5\cos\theta, y = -3 + 5\sin\theta$
3. C.
   $x = 2 + 12\cos\theta, y = 3 + 12\sin\theta$
4. D.
   $x = 3 + 5\cos\theta, y = 2 + 5\sin\theta$

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1. A.
   $(x - 1)^2 + (y - 6)^2 = 10$
2. B.
   $(x - 3)^2 + (y - 4)^2 = 2$
3. C.
   $x^2 + (y - 7)^2 = 20$
4. D.
   $(x - 2)^2 + (y - 5)^2 = 4$

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1. A.
   $8\sqrt{3}$ sq. units
2. B.
   $\frac{4}{\sqrt{3}}$ sq. units
3. C.
   $4\sqrt{3}$ sq. units
4. D.
   $\sqrt{3}$ sq. units

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1. A.
   $\dfrac{\pi}{2}$
2. B.
   $\dfrac{\pi}{3}$
3. C.
   $\dfrac{\pi}{4}$
4. D.
   $\dfrac{\pi}{6}$

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