Equations of Circles
Presentation
•
Mathematics
•
9th - 12th Grade
•
Medium
Standards-aligned
Maggie Seawright
Used 221+ times
FREE Resource
4 Slides • 7 Questions
1
Equations of Circles
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From the Equation
Make the signs on h and k OPPOSITE to get the center
Take the SQUARE ROOT of r2 to get the radius
If you don't SEE a h or k, then that means the coordinate is ZERO.
3
Multiple Choice
4
Multiple Choice
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Multiple Choice
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To Write the Equation
Make the signs on the center OPPOSITE before you plug them in for h and k.
SQUARE the radius (multiply it by itself) before you plug it in for r2
If you were given the diameter, then divide that by 2 to get the radius. And then square it before you plug it in as r2
7
Multiple Choice
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Multiple Choice
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From a Graph
Find the coordinates of the center. Make the signs on both of them OPPOSITE before you plug them in for h and k.
Find the radius by counting the distance from the center out to the edge of the circle. Then SQUARE that before you plug it in for r2
10
Multiple Choice
What is the equation for this circle?
11
Multiple Choice
What is the equation of the circle?
Equations of Circles
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