Quadrilateral 8221

Calculate the height and surface of a regular quadrilateral pyramid with a base edge a = 8 cm and a wall height w = 10 cm

Correct answer:

h =  9.1652 cm
S =  224 cm2

Step-by-step explanation:

a=8 cm w=10 cm  h=w2(a/2)2=102(8/2)2=2 21=9.1652 cm
S1=a2=82=64 cm2 S2=21 a w=21 8 10=40 cm2  S=S1+4 S2=64+4 40=224 cm2

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