Triangular pyramid

What is the volume of a regular triangular pyramid with a side 3 cm long?

Correct answer:

V =  3.182 cm3

Step-by-step explanation:

a=3 cm  h1=a2(a/2)2=32(3/2)22.5981 cm  h=h12(h1/3)2=2.59812(2.5981/3)2=6 cm2.4495 cm  S1=a h1/2=3 2.5981/23.8971 cm2  V=13 S1 h=13 3.8971 2.4495=3.182 cm3



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