Equations of Circles

Equations of Circles

Multiple Choice

If the center of the circle is (3, 5) then the first part of the equation will be:

• ( x + 3 )² + ( y + 5 )²

• ( x - 3 )² + ( y - 5 )²

• ( x + 3 )² + ( y - 5 )²

• ( x + 3 )² + ( y - 5 )²

Multiple Choice

If the center of the circle is (-3, -5) then the first part of the equation will be:

• ( x + 3 )² + ( y + 5 )²

• ( x - 3 )² + ( y - 5 )²

• ( x + 9 )² + ( y + 25 )²

• ( x - 9 )² + ( y - 25 )²

Multiple Choice

If the radius of a circle is 4, then the last part of the equation will be:

• = 16

• = 4

• = 2

• = 8

Multiple Choice

If the radius of a circle is 3, then the last part of the equation will be:

• = 9

• = 3

• = 6

• = 12

Multiple Choice

If the center of the circle is (6, 7) and the radius is 6, the correct equation will be:

• ( x + 6 )² + ( y + 7 )² = 6

• ( x - 6 )² + ( y - 7 )² = 6

• ( x - 6 )² + ( y - 7 )² = 36

• ( x - 6 )² + ( y - 7 )² = 12

Multiple Choice

If the center of the circle is (2, 3) and the radius is 2, the correct equation will be:

• ( x + 2 )² + ( y + 3 )² = 2

• ( x - 2 )² + ( y - 3 )² = 4

• ( x - 2 )² + ( y - 3 )² = 2

• ( x + 2 )² + ( y + 3 )² = 4