Quadrilateral 82066

Calculate the volume of a regular quadrilateral pyramid with a square base of side a = 3 cm and side length b = 7 cm.

Correct answer:

V =  20.0125 cm3

Step-by-step explanation:

a=3 cm b=7 cm  u=2 a=2 3=3 2 cm4.2426 cm  b2 = h2 + (u/2)2  h=b2(u/2)2=72(4.2426/2)26.6708 cm  S1=a2=32=9 cm2  V=31 S1 h=31 9 6.6708=20.0125 cm3



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