Completing the Square

• 16

• 4

• 8

• 2

• 6

• 3

• 9

• -6

• (h,k) is the center of the circle

• (h,k) is a point on the circle

• (h,k) is a point that we guess and find

• (h,k) is the distance from the center to the edge of the circle

• r is the distance around the circle

• r is the radius of the circle

• r is the center of the circle

• r is the distance of the line that divides the circle in half

• Center: (-4,-3)

  Radius = 5 units

• Center: (4,3)

  Radius = 25 units

• Center: (4,3)

  Radius = 5 units

• Center: (-4,-3)

  Radius = 25 units

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