Online Course Discussion Forum
MC-2A Help on 9.27
I have no clue on how to start this after cutting the tetrahedron, and I am also confused on how to cut the tetrahedrons.
Nevermind, I figured it out. Thanks anyways. Also, I am having a little trouble understanding what to do in 9.30. Do we find the radius of the sphere? And how do I even start the question?
Think of the sphere that is inscribed in the conic frustrum as a ball stuck in a cone.
You'd see that the sphere is touching the frustrum at one point on the bottom base, one point on the top base, and around a circle on the "side". Your goal is to find the radius of this circle.
A side view diagram of the frustrum might help: