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Mathematics LibreTexts

A.10: Areas

  • Page ID
    91826
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    • Area of a rectangle

      \begin{align*} A &= b h \end{align*}

    • Area of a triangle

      \begin{align*} A &= \frac{1}{2} b h = \frac{1}{2} ab \sin \theta \end{align*}

    • Area of a circle

      \begin{align*} A &= \pi r^2 \end{align*}

    • Area of an ellipse

      \begin{align*} A &= \pi ab \end{align*}


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