Important Formulas Flashcards by Aly Bainey

Q

Circumference?

A

3.14 x D

OR

2πr

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Q

Perimeter?

A

Add all sides

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Q

Area of Rectangle?

A

L x W

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Q

Area of Parallelogram?

A

B x H

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Q

Area of triangle?

A

1/2 (B x H)

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Q

Area of trapezoid?

A

1/2 H (b1+b2)

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Q

Area of circle?

A

πr2

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Q

Surface area of prism?

A

SA= 2( L x W)+ 2(L x H)+ 2(H x W)

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Q

Volume of prism?

A

LxWxH

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Q

Volume of cylinder?

A

πr2(H)

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Q

Surface Area of cylinder?

A

SA= (2πr2)+(2πrH)

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Q

Volume of a pyramid?

A

V= 1/3 (L x W x H)

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Q

Volume of a cone?

A

V= 1/3 πr2H

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Q

Surface area of a pyramid?

A

SA= ( area of base)+ 1/2 ( perimeter of base)h

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Q

Surface Area of a cone?

A

SA= πr2 + πrL

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Q

Volume of sphere?

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A

(4/3) πr3

Q

Surface area of sphere?

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A

4πr2

Q

Surface area of triangle?

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A

2(1/2x L x H) + H(perimeter of triangle)