The pyramid

The pyramid with a square base is 50 m high and the height of the sidewall is 80 m. Find the endge of the base of the pyramid.

Correct result:

a =  124.9 m

Solution:

h=50 m s=80 m  s2=h2+(a/2)2  a=2⋅ s2−h2=2⋅ 802−502=20 39=124.9 m

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