Basic Technical Mathematics, 11th Edition

GEOMETRIC FORMULAS

• 

  Triangle

  $A\hspace{0.17em}=\hspace{0.17em}\frac{{\displaystyle 1}}{{\displaystyle 2}}bh$

• 

  Circle

  $A\hspace{0.17em}=\hspace{0.17em}\pi r^2$

  $c\hspace{0.17em}=\hspace{0.17em}2\pi r$

• 

  Parallelogram

  $A\hspace{0.17em}=\hspace{0.17em}bh$

• 

  Trapezoid

  $A\hspace{0.17em}=\hspace{0.17em}\frac{{\displaystyle 1}}{{\displaystyle 2}}h(b_1\hspace{0.17em}+\hspace{0.17em}{b}_2)$

• 

  Pythagorean Theorem

  $c^2\hspace{0.17em}=\hspace{0.17em}{a}^2\hspace{0.17em}+\hspace{0.17em}{b}^2$

• Cylinder

  $\begin{array}{c}V\hspace{0.17em}=\hspace{0.17em}\pi r^{2}h\\ A\hspace{0.17em}=\hspace{0.17em}2\pi rh\hspace{0.17em}+\hspace{0.17em}2\pi r^2\end{array}$

• Cone

  $\begin{array}{c}V\hspace{0.17em}=\hspace{0.17em}\frac{{\displaystyle 1}}{{\displaystyle 3}}\pi r^{2}h\\ A\hspace{0.17em}=\hspace{0.17em}\pi rs\hspace{0.17em}+\hspace{0.17em}\pi r^2\end{array}$