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A = l x w
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A = Area
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l = length
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w = width (or base)
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A = l²
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A = Area
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l = length
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A = π r²
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A = Area
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r = radius
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A = 0.5 x (π x r2)
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A = Area
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r = radius
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c² = b² + a²
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c = √c²
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c = hypotenuse
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a = leg 1
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a² = c² - b²
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a = √a²
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b = leg 2
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b² = c² - a²
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b = √b²
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A = h x b ÷ 2
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A = Area
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h = height
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b = base
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I hope this cheat sheet is useful and if it is, don't hesitate to comment!
Cheatography n. The art of mapping complex subjects into clear, instantly navigable reference guides.