Areteem: I am confused about some questions II-A

Online Course Discussion Forum

Hi for 9.21 what does "put" mean? for 9.30, if the sphere is inscribed, shouldn't the intersections just be a point (radius=0)?

In 9.21, "put" should mean "fit" or "inscribe".

In 9.30, the sphere is touching the side surface of the frustrum, so it is a circle.

Ok I don't know how to do those 2