How to find the equation of a circle

Practice Questions

Intermediate Geometry › How to find the equation of a circle

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1

What is the equation of a circle that has its center at and a radius length of ?

2

A circle has its center at the point and a radius of units.

What is the equation of the circle?

3

Find the equation of a circle if the radius of the circle is and the center is located at the origin.

4

Write the equation for the circle with center and radius

5

What is the equation for a circle centered at with a radius of ?

6

What is the equation of a circle that has its center of and a radius of ?

7

A circle has a diameter starting at and ending at . What is the equation of the circle?

8

Which of these points is inside the circle

?

9

What is the equation of a circle that has its center of and a radius of ?

10

What is the equation of a circle that has its center at and a radius of ?

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