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Lesson: 10 – 8 Equations of Circles
Geometry Lesson: 10 – 8 Equations of Circles Objective: Write the equation of a circle. Graph a circle on the coordinate plane.
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How do you find d?
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Equation of a Circle Standard Form (center-radius form)
Copy all Equation of a Circle Standard Form (center-radius form)
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Write an equation using the center and radius.
Center at (1, -8) radius 7
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Write an equation using the center and radius.
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Write an equation using the center and radius.
Center at origin, radius
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Write the equation of each circle
Center at (-2, 4) passes through (-6, 7) Use the distance formula to find the radius.
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Center: (4, -1) Radius: 3 Center: (0, 0) Radius: 2
For each circle with the given equation, state the coordinates of the center and the measure of the radius. Then graph. Center: (4, -1) Radius: 3 Center: (0, 0) Radius: 2
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Homework Pg – 8 E, 12 – 24 E, 46 – 52 E
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