MA.912.G.6.6 Equations of Circles
Two-Dimensional
MA.912.G.1.1 Line Segments
MA.912.G.1.3 Parallel Line ∠s
MA.912.G.2.2 ∠ s of Polygons
MA.912.G.2.3 Prop of Polygons
MA.912.G.2.4 Transformations
MA.912.G.2.5 Perimeter & Area
MA.912.G.3.3 Prop of Quads
MA.912.G.3.4 Quad Theorems
MA.912.G.4.6 ~ & 
MA.912.G.4.7 Inequality Theo
MA.912.G.5.4 Right Triangles
MA.912.G.6.5 Circle Measures
MA.912.G.6.6 Circle Equations
MA.912.G.8.4 Conjectures
Three-Dimensional
Trig & Discrete Math
In Your Text
Explore 10-8; 743
Section 10-8; 744-749
What You Need To Know...
The equation of a circle in the coordinate plane.
- The benchmark will be assessed using MC (Multiple Choice) items.
- Items may have given information including the center and the radius of a circle and request the equation.
- Items may give the equation of a circle and request the center and the radius.
Example One
Circle Q has a radius of 5 units with center Q(3.7, -2). Which of the following equations defines circle Q?
- (x + 3.7)2 + (y - 2)2 = 5
- (x + 3.7)2 + (y - 2)2 = 25
- (x - 3.7)2 + (y + 2)2 = 5
- (x - 3.7)2 + (y + 2)2 = 25
Additional Examples
Equation of a Circle
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Given Radius and Center
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