Pyramid

The pyramid has a base rectangle with a = 6cm, b = 8cm. The side edges are the same and their length = 12.5 cm. Calculate the surface of the pyramid.

Correct result:

S =  215.5497 cm2

Solution:

a=6 cm b=8 cm s=12.5 cm  v1=s2(a/2)2=12.52(6/2)212.1347 cm v2=s2(b/2)2=12.52(8/2)211.8427 cm S1=a v1/2=6 12.1347/236.404 cm2 S2=b v2/2=8 11.8427/2=2 561 cm247.3709 cm2 S3=a b=6 8=48 cm2 S=2 S1+2 S2+S3=2 36.404+2 47.3709+48=215.5497 cm2



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