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Formulas for Perimeter, Area and Volume - Secondary 1 and 2
| Mathematics
Table of contents
Formulas for Plane Figures
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The perimeter, generally denoted |P,| is the length of the contour of a figure. In the case of the circle, the perimeter is called “circumference” and is denoted |C.|
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The area, generally denoted |A,| is the surface delimited by a figure.
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Plane Figure |
Perimeter |
Area |
|---|---|---|
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||P=\color{#3A9A38}{\boldsymbol{a}}+\color{#3B87CD}{\boldsymbol{b}}+\color{#FF55C3}{\boldsymbol{c}}|| | ||A=\dfrac{\color{#3B87CD}{\boldsymbol{b}}\times\color{#EC0000}{\boldsymbol{h}}}{2}|| |
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||\begin{align}P&=\color{#3A9A38}{\boldsymbol{s}}+\color{#3A9A38}{\boldsymbol{s}}+\color{#3A9A38}{\boldsymbol{s}}+\color{#3A9A38}{\boldsymbol{s}}\\&=4\color{#3A9A38}{\boldsymbol{s}}\end{align}|| | ||\begin{align}A&=\color{#3A9A38}{\boldsymbol{s}}\times\color{#3A9A38}{\boldsymbol{s}}\\&=\color{#3A9A38}{\boldsymbol{s}}^2\end{align}|| |
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||\begin{align}P&=\color{#3B87CD}{\boldsymbol{b}}+\color{#3B87CD}{\boldsymbol{b}}+\color{#EC0000}{\boldsymbol{h}}+\color{#EC0000}{\boldsymbol{h}}\\&=2\color{#3B87CD}{\boldsymbol{b}}+2\color{#EC0000}{\boldsymbol{h}}\\&=2(\color{#3B87CD}{\boldsymbol{b}}+\color{#EC0000}{\boldsymbol{h}})\end{align}|| | ||A=\color{#3B87CD}{\boldsymbol{b}}\times\color{#EC0000}{\boldsymbol{h}}|| |
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||\begin{align}P&=\color{#FF55C3}{\boldsymbol{a}}+\color{#FF55C3}{\boldsymbol{a}}+\color{#3B87CD}{\boldsymbol{b}}+\color{#3B87CD}{\boldsymbol{b}}\\&=2\color{#FF55C3}{\boldsymbol{a}}+2\color{#3B87CD}{\boldsymbol{b}}\\&=2(\color{#FF55C3}{\boldsymbol{a}}+\color{#3B87CD}{\boldsymbol{b}})\end{align}|| | ||A=\color{#3B87CD}{\boldsymbol{b}}\times\color{#EC0000}{\boldsymbol{h}}|| |
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||\begin{align}P&=\color{#3A9A38}{\boldsymbol{s}}+\color{#3A9A38}{\boldsymbol{s}}+\color{#3A9A38}{\boldsymbol{s}}+\color{#3A9A38}{\boldsymbol{s}}\\&=4\color{#3A9A38}{\boldsymbol{s}}\end{align}|| | ||A=\dfrac{\color{#FF55C3}{\boldsymbol{D}}\times\color{#3B87CD}{\boldsymbol{d}}}{2}|| |
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||P=\color{#3B87CD}{\boldsymbol{b}}+\color{#3A9A38}{\boldsymbol{a}}+\color{#FA7921}{\boldsymbol{B}}+\color{#FF55C3}{\boldsymbol{c}}|| | ||A=\dfrac{(\color{#3B87CD}{\boldsymbol{b}}+\color{#FA7921}{\boldsymbol{B}})\times\color{#EC0000}{\boldsymbol{h}}}{2}|| |
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||P=n\times\color{#3A9A38}{\boldsymbol{s}}|| | ||A=\dfrac{\color{#3A9A38}{\boldsymbol{s}}\color{#FA7921}{\boldsymbol{a}}n}{2}|| |
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||C=2\pi\color{#3A9A38}{\boldsymbol{r}}|| | ||A=\pi\color{#3A9A38}{\boldsymbol{r}}^2|| |
Formulas for Solids
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The area of the base, generally denoted |A_b,| is the surface occupied by the figure(s) that serve as base for a solid.
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The lateral area, generally denoted |A_L,| is the surface occupied by the figures that do not serve as base for a solid.
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The total area, generally denoted |A_T,| is the surface occupied by all the figures forming a solid.
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Solid |
Area |
|---|---|
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||\begin{align}A_b&=\color{#3a9a38}{\boldsymbol{s}}^2\\\\ A_L&=4\color{#3a9a38}{\boldsymbol{s}}^2\\\\A_T&=6\color{#3a9a38}{\boldsymbol{s}}^2\end{align}|| |
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||\begin{align}\color{#3b87cd}{\boldsymbol{A_b}}&=\text{relevant formula}\\\\A_L&=P_b\times\color{#ec0000}{\boldsymbol{h}}\\\\A_T&=A_L+2\color{#3b87cd}{\boldsymbol{A_b}}\end{align}|| |
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||\begin{align}\color{#3b87cd}{\boldsymbol{A_b}}&=\text{relevant formula}\\\\A_L&=\dfrac{P_b\times\color{#fa7921}{\boldsymbol{a}}}{2}\\\\A_T&=A_L+\color{#3b87cd}{\boldsymbol{A_b}}\end{align}|| |
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||\begin{align}\color{#3b87cd}{\boldsymbol{A_b}}&=\pi\color{#3a9a38}{\boldsymbol{r}}^2\\\\A_L&=2\pi\color{#3a9a38}{\boldsymbol{r}}\color{#ec0000}{\boldsymbol{h}}\\\\A_T&=A_L+2\color{#3b87cd}{\boldsymbol{A_b}}\end{align}|| |