Circles Practice

Which of the following is the equation of a circle with a center at (-1,3) and a radius of 4?

• (x-1)²+(y+3)²=4

• (x-1)²+(y+3)²=16

• (x+1)²+(y-3)²=4

• (x+1)²+(y-3)²=16

Which circle has a center at (-3,-6) and passes through the point (-4,8)?

• (x-3)²+(y-6)²=197

• (x+3)²+(y+6)²=197

• (x-3)²+(y-6)²=32

• (x+3)²+(y+6)²=32

Which choice is the equation of a circle with center (-3,4) and passing through (-6,0)?

• (x+3)²+(y-4)²=25

• (x+3)²+(y-4)²=27

• (x-3)²+(y+4)²=25

• (x-3)²+(y+4)²=27

• (x-3)²-(y+1)²=8

• (x-3)²+(y+1)²=8

• (x+3)²+(y-1)²=16

• (x-3)²-(y+1)²=16

• (x-3)²+(y+1)²=16

• (x+6)²+(y-1)²=14

• (x-6)²+(y+1)²=49

• (x+6)²+(y-1)²=49

• (x+6)²+(y-1)²=7

• (x-6)²+(y+1)²=7

• (x+4)²+(y+13)²=16

• (x-4)²+(y-13)²=16

• (x-4)²+(y-13)²=64

• (x+4)²+(y+13)²=256

• (x-4)²+(y-13)²=256

Write the equation of the circle with center C( -5, 8 ) and radius = 7.

• ( x - 5 )² + ( y + 8 )² = 14

• ( x - 5 )² + ( y - 8 )² = 49

• ( x - 5 )² + ( y + 8 )² = 49

• ( x + 5 )² + ( y - 8 )² = 49

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

• 14

• 98

• 7

• 49

Write the equation of a circle with a center (7, 0) with radius 3.

• (x - 7)² + y² = 9

• x² + (y -7)² = 9

• (x - 7)² + y² = 3

• x² + (y -7)² = 3

What are the coordinates of the center and the radius of the circle with the equation:

(x - 4)² + (y - 3)² = 25 ?

• Center (-4,-3)

  Radius = 25 units

• Center (4,3)

  Radius = 5 units

• Center (4,3)

  Radius = 25 units

• Center (-4,-3)

  Radius = 5 units