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12.3: Geometric Formulas
https://math.libretexts.org/Courses/Grayson_College/Prealgebra/Book%3A_Prealgebra_(OpenStax)/12%3A_Appendix/12.3%3A_Geometric_Formulas
Perimeter: P = a + b + c Area: A = $\dfrac{1}{2}$ bh Sum of Angles: A + B + C = 180° Area: A = $\dfrac{1}{2}$ ab Circumference: C = 2 $\pi$ r or C = $\pi$ d Area: A = $\pi$ r 2 Perimeter: P = a + ...Perimeter: P = a + b + c Area: A = $\dfrac{1}{2}$ bh Sum of Angles: A + B + C = 180° Area: A = $\dfrac{1}{2}$ ab Circumference: C = 2 $\pi$ r or C = $\pi$ d Area: A = $\pi$ r 2 Perimeter: P = a + b + c + B Area: A = $\dfrac{1}{2}$ (B + b)h Volume: V = $\dfrac{1}{3} \pi r^{2} h$ Surface Area: SA = $\pi r^{2} + \pi r \sqrt{h^{2} + r^{2}}$ Volume: V = $\dfrac{4}{3} \pi r^{3}$ Surface Area: SA = $4 \pi r^{2}$ Volume: V = $\pi r^{2} h$ Surface Area: SA = $2 \pi r^{2} + 2 \pi rh$

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