Circle Equations Flashcards by huda omer

Q

Area of a circle?

A

πr^2

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Q

Circumference of a circle?

A

2πr

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Q

Arc length?

A

x/360 x 2πr

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Q

Area of a Sector?

A

x/360 x πr^2

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Q

Equation of a circle?

A

x^2 + y^2 = r^2

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