Triangular pyramid

Calculate the volume and surface area of a regular triangular pyramid whose height is equal to the length of the base edges 10 cm.

Correct result:

V =  144.3376 cm3
S =  193.3638 cm2

Solution:

a=10 cm h=a=10=10 cm  S1=34 a2=34 102=25 3 cm243.3013 cm2 V=13 S1 h=13 43.3013 10=144.3376 cm3
r=360.2887 cm h=h2+r2=10.00422+0.2887210.0042 cm S2=12 a h=12 10 10.004250.0208 cm2  S=S1+3 S2=43.3013+3 50.0208=193.3638 cm2



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Reynie
Easy problem solving????????????????????????

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