Online Course Discussion Forum

I am confused about some questions II-A

 
 
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I am confused about some questions II-A
by Kevin Song - Saturday, 14 November 2020, 11:35 AM
 

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)?

 
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Re: I am confused about some questions II-A
by Dr. Kevin Wang - Sunday, 15 November 2020, 8:51 AM
 

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.

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Re: I am confused about some questions II-A
by Kevin Song - Sunday, 15 November 2020, 2:53 PM
 

Ok I don't know how to do those 2