quartz/content/vault/surface area of shapes.md

cards-deck
default_obsidian

#math/calculus

cutoff of cone

taken via an integral of the circumference times length of side of the cone. It's weird, because the cones vs cylinders derivation is pretty unnecessary. It becomes sort of the same thing.

formula

#card/reverse \pi l_{2}(r_{1}+r_{2})=2\pi l_{2}\bar{r} (2X the average r) Good for measuring the surface area of a line's rotation round an axis. L_2 being the length of the line we're measuring over. ^1652711080597