Target the Center!
Identify the center
(x−3)2 + (y+2)2 = 16
What is the center (3, -2)?
Identify the radius:
(x−3)2 + (y+2)2 = 16
What is the radius 4?
Write the equation:
Center: (0, 0), Radius: 5
What is
x2 + y2 = 25?
x2 + 6x + y2 − 4y = 12
What is
(x+3)2 + (y−2)2 = 25?
Circle: (x−2)2 + (y−3)2 = 25;
Point: (5, 7)
What is on the circle?
Identify the center
(x+5)2 +(y−7)2 = 25
What is the center (-5, 7)?
Identify the radius:
(x+1)2 + (y−1)2 = 100
What is the radius 10?
Write the equation:
Center: (2, -3), Radius: 4
What is
(x−2)2 + (y+3)2 = 16?
x2 − 2x + y2 + 8y = −1
What is
(x−1)2 + (y+4)2 = 16?
Circle: (x+1)2 + (y−2)2 = 16
Point: (1, 2)
What is inside the circle?
Identify the center
(x+1)2 + (y+1)2 = 9
What is the center (-1, -1)?
Identify the radius:
(x−7)2 + (y+3)2 = 81
What is the radius 9?
Write the equation:
Center: (-5, 5), Radius: 3
What is
(x+5)2 + (y−5)2 = 9?
x2 + y2 + 4x − 6y = 3
What is
(x+2)2 + (y−3)2 = 16?
Circle: (x−4)2 + (y+5)2 = 9
Point: (1, -5)
What is outside the circle?
Identify the center
(x−0)2 + (y−4)2 = 49
What is the center (0, 4)?
Identify the radius:
(x−4)2 + (y−4)2 = 64
What is the radius 8?
Write the equation:
Center: (-1, -2), Radius: 6
What is
(x+1)2 + (y+2)2 = 36?
x2 + y2 − 10x + 4y + 13 = 0
What is
(x−5)2 + (y+2)2 = 16?
Circle: (x−3)2 + (y−3)2 = 36
Point: (6, 7)
What is on the circle?
Identify the center
(x−6)2 + (y−8)2 = 1
What is the center (6, 8)?
Identify the radius:
(x+2)2 + (y−6)2 = 121
What is the radius 11?
Write the equation:
Center: (7, -4), Radius: 2sqrt2
What is
(x−7)2 + (y+4)2 = 8?
x2 + y2 − 8x − 6y + 21 = 0
What is
(x−4)2 + (y−3)2 = 4?
Circle: (x+2)2 + (y+1)2 = 4
Point: (0, 0)
What is outside the circle?