10.1: Plane
- Page ID
- 21640
This page is a draft and is under active development.
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Area (A) is measured in square units, perimeter (P) is measured in units, and circumference (C) is measured in units.
Square
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\[P=4 s \]
\[A=s^{2}\]
Rectangle
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\[P=2 l+2 w \]
\[A=l w\]
Parallelogram
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\[P=2 a+2 b\]
\[A=b h\]
Trapezoid
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\[P=a+b+c+d\]
\[A=\frac{1}{2} h(a+b)\]
Triangle
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\[P=a+b+c\]
\[A=\frac{1}{2} b h\]
Circle
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\[C=2 \pi \]
\[r=\pi r^{2}\]