Regular quadrangular pyramid

How many square meters are needed to cover the tower the shape of a regular quadrangular pyramid base edge 10 meters, if the deviation lateral edges from the base plane are 68 °? Calculate coverage of waste by 10%.

Correct result:

S =  400.4379 m2

Solution:

h=(a/2)2tan68=17.502 h2=h2+(a/2)2=18.202 S1=ah2/2=91.01 S=4S11.1=400.4379 m2



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