Pyramid-shaped 30191

Above the pavilion, with a square floor plan with side a = 12 m, is a pyramid-shaped roof with a height of 4.5 m. How many m2 of sheet metal is needed to cover this roof?

Correct answer:

S =  180 m2

Step-by-step explanation:

a=12 m h=4.5 m  h2=(a/2)2+h2=(12/2)2+4.52=215=7.5 m  S1=2a h2=212 7.5=45 m2  S=4 S1=4 45=180 m2

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