Equations of a Circle Find Center and Radius

Find the equation of the circle: 
 center (-2,-7), radius is 3

• (x + 2)² + (y + 7)² = 3

• (x - 2)² + (y - 7)² = 9

• (x + 2)² + (y + 7)² = 9

• (x - 2)² + (y - 7)² = 3

In the equation (x+2)²+(y-3)²=4, the center of the circle is at...

• (-2, 3)

• (-3, 2)

• (2, -3)

• (3, -2)

In the equation (x-4)²+(x-3)²=25, the center of the circle is at...

• (-3, -4)

• (4, 3)

• (-4, -3)

• (3, 4)

In the equation (x-3)²+(y+4)²=121, the center of the circle is at...

• (3, -4)

• (-3, 4)

• (4, 3)

• (-4, -3)

In the equation (x-3)²+(y+4)²=121, the radius of the circle is

• 242

• 11

• 121

• 22

In the equation (x+2)²+(y+3)²=49, the center of the circle is at....

• (2, 3)

• (3, 2)

• (-3, -2)

• (-2, -3)

Convert the equation of the circle from general to standard form.

• A

• B

• C

• D

Identify the center and the radius of the circle in general form.

• A

• B

• C

• D

Which of the following equations of circle in general form given the center at (3, 4) and radius of 5 units?

• (x – 3)² - (y – 4)² = 25

• (x – 3)² + (y – 4)² = 25

• x² + y² + 6x - 8y - 25 = 0

• x² + y² - 6x - 8y = 0

Which of the following equations of circle in general form given the center at (5, -8) and radius of 11 units?

• x² + y² -10x + 16y + 32 = 0

• x² + y² -10x + 16y - 32 = 0

• (x - 5)² + (y + 8)² = 11

• (x - 5)² + (y + 8)² = 121