Quadrilateral 19413

Calculate the surface area of ​​a regular quadrilateral pyramid given:
a= 3.2 cm h= 19 cm
1) calculation of the height of the side wall
2) content of the base
3) shell contents
4) the surface of a regular quadrilateral pyramid

Correct answer:

S =  132.2704 cm2

Step-by-step explanation:

a=3.2 cm v=19 cm  w2 = v2 + (a/2)2 w=v2+(a/2)2=192+(3.2/2)219.0672 cm  S1=a2=3.22=25256=10.24 cm2 S2=2a w=23.2 19.067230.5076 cm2  S=S1+4 S2=10.24+4 30.5076=132.2704 cm2

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