Accel Geo B/Alg II
Name: _____________________________
Circles Practice Classwork
Period: ______ Date: _______________
Section 1
Use the information provided to write the equation of each circle in standard and general form.
1) Center: (-13, 0) 2) Center: (17, 16)
Radius: 4 Point on the circle: (-2, 11)
3) Center: (7, -8) 4) Endpoints of a Diameter of a Circle:
Tangent line on the y-axis (-10, -2) and (-8, 14)
Section 2
Identify the center and radius of each circle, then sketch the graph.
5) (x + 3
2)2+ (y − 4)2= 5 6) (x + 1)2+ (y − 3)2= 9 7) 𝑥2+ (y + 1)2=20
Section 3
Use the information provided to write the standard form equation of each circle:
8) 𝑥2+ 𝑦 2− 8𝑥 + 8𝑦 − 32 = 0 9) 𝑥2+ 𝑦 2−24𝑥 + 120 = 0
10) 𝑥2+ 𝑦2+ 4𝑥 + 14𝑦 − 47 = 0 11) 𝑥2+ 𝑦2−11𝑦 + 3 = 0
Section 4
Determine if the following points are on, inside, or outside the circle (x + 2)2+ (y − 4)2=400
12) Point: (-2, 24) 13) Point: (0, 26) 14) Point: (14, -7)
