geometry formulas Flashcards by violet r | Brainscape

Q

area of a triangle

A

1/2bh

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Q

area of a square

A

s²

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Q

perimeter of a square

A

4s

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Q

area of a rectangle

A

lw

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Q

perimeter of a rectangle

A

2l + 2w

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Q

area of a circle

A

πr²

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Q

circumference of a circle

A

2πr

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Q

area of a parallelogram

A

bh

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Q

area of a trapezoid

A

1/2h (b1 + b2)

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Q

volume of a rectangular prism

A

lwh

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Q

surface area of a rectangular prism

A

2lw + 2lh + 2wh

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Q

volume of all other prisms

A

Bh

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Q

surface area of all other prisms

A

hp + 2B

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Q

volume of a pyramid

A

1/3 Bh

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Q

surface area of a pyramid

A

1/2 lp + B

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Q

volume of a cylinder

A

πr²h

Q

surface area of a cylinder

A

2πr² + 2πrh

Q

volume of a cone

A

1/3 πr²h

Q

surface area of a cone

A

πr² + πrl

Q

volume of a sphere

A

4/3πr^3

Q

surface area of a sphere

A

4πr²

Q

volume of a hemisphere

A

2/3πr^3

Q

surface area of a hemisphere

A

3πr²

Q

how to find the area of a sector

A

(x * πr²) / 360