Pluggakuten.se / Formelsamling / Matematik / Geometri

Figur	Formler	Illustration
Triangel	$Area = \frac{bh}{2}$
Parallellogram
Parallelltrapets	$Area = \frac{h}{2}(a+b)$
Cirkel	$Area = \pi r^2 = \frac{\pi d^2}{4}\\ Omkrets = 2\pi r = \pi d$
Cirkelsektor	$b = \underbrace{\frac{\alpha}{360}2\pi r}_{grader} = \underbrace{\alpha r}_{radianer}\\ Area = \frac{br}{2}= \underbrace{\frac{\alpha }{360}\pi r^2}_{grader} = \underbrace{\frac{\alpha r^2}{2}}_{radianer}$
Cylinder	$Volym = \pi r^2 h \\ Mantelalrea = 2\pi rh$
Pyramid	$Volym = \frac{Bh}{3}$
Kon	$Volym = \frac{\pi r^2 h}{3}\\ Mantelarea = \pi r s$
Sfär (klot)	$Area = 4\pi r^2 \\ Volym = \frac{4\pi r^3}{3}$