Law Of The Donut Math Answer Key Direct

It sounds like you’re referring to the — a common playful name for a math problem involving torus volume or surface area , often found in calculus or geometry classes.

[ V = (\pi r^2) \times (2\pi R) = 2\pi^2 R r^2 ] For surface area ( S ): Law Of The Donut Math Answer Key

[ S = 4\pi^2 R r ]

[ V = 2\pi^2 R r^2 ]

This comes from Pappus’s theorem: Volume = (cross-sectional area of tube) × (distance traveled by its centroid) Cross-sectional area of tube = ( \pi r^2 ) Distance traveled by centroid = ( 2\pi R ) So: It sounds like you’re referring to the —