Circle Equations + Lines + Graphing Equations

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Last updated 2:10 AM on 5/19/26

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9 Terms

1

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Circumference

C = 2πr

2

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Diameter

d = 2r

3

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Arc Length

(n/360)(Circumference)

4

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Area of a circle

πr²

5

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An arc is a section

of the circumference of a circle

6

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A sector is a portion of a circle’s area

that is bounded by two radii and an arc

7

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Area of sector

(n/360)(Area of circle)

8

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Equation of a line

Y = mx + b

9

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Graphing circle

(x-a)² + (y-b)² = r²