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1. A right pyramid has a regular hexagon as a base. The slant height is 20, and the perimeter of its base is 10. What is the lateral surface area of the pyramid?

 

2. A pyramid and a prism share the same base. The prism has 99 edges. How many faces does the pyramid have?

 Mar 26, 2019
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1. The lateral surface area is 40*sqrt(7).

 

2. The number of faces is 402.

 Dec 1, 2019

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