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Hint

1

area of a circle

πr²

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2

circumference of a circle

2πr

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3

area of a rectangle

lw

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4

area of a triangle

(1/2)bh

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5

find a side (pythagorean theorem)

c²=a²+b²

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6

30-60-90 triangle

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7

45-45-90 triangle

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8

volume of a rectangular prism

lwh

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9

volume of a cylinder

πr²h

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10

volume of a sphere

(4/3)πr³

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11

volume of a pyramid

(1/3)lwh

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