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Mathorio

Worksheet

Circles in Standard Form

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Class:

Date:

Show your work for each problem.

1.
What is the center of the circle ?
1. a)
2. b)
3. c)
4. d)
2.
What is the radius of the circle ?
1. a)
2. b)
3. c)
4. d)
3.
A circle has equation . What is the radius?
4.
What is the center of the circle ?
1. a)
2. b)
3. c)
4. d)
5.
What is the y-coordinate of the center of ?
6.
Write the equation of a circle with center and radius . Enter only value.
7.
A circle has center and radius . What is the equation?
1. a)
2. b)
3. c)
4. d)
8.
Find the center and radius of .
9.
Write the equation of a circle with center and radius .
10.
Which point lies ON the circle ?
1. a)
2. b)
3. c)
4. d)
11.
A circle has center and passes through . Find the radius.
12.
If a circle has equation , what is its diameter?
13.
Write the equation of a circle with center that passes through .
14.
Point lies on a circle centered at the origin. What is ?
1. a)
2. b)
3. c)
4. d)
15.
Is the point inside, on, or outside the circle ?