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Section A.10 Areas

  • 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*}