The base of a triangular pyramid is a triangle with corners at (6 ,2 ), (3 ,5 ), and (4 ,2 ). If the pyramid has a height of 8 , what is the pyramid's volume?

1 Answer

V=8" "cubic units

Explanation:

the volume V of a triangular pyramid has the formula

Volume = 1/3 of Area of base * Height of pyramid

Let us compute the area A of the base with
P_1(x_1, y_1)=(6, 2)
P_2(x_2, y_2)=(3, 5)
P_3(x_3, y_3)=(4, 2)

A=1/2[(x_1, x_2, x_3, x_1),(y_1, y_2, y_3, y_1)]

A=1/2*[x_1*y_2+x_2*y_3+x_3*y_1-x_2*y_1-x_3*y_2-x_1*y_3]

A=1/2[(6, 3, 4, 6),(2, 5, 2, 2)]

A=1/2*[6*5+3*2+4*2-3*2-4*5-6*2]

A=1/[30+6+8-6-20-12]

A=1/2(44-38)

A=3" "square units

Let us now compute the volume V of the pyramid

V=1/3*A*h

V=1/3*3*8

V=8" "cubic units

God bless....I hope the explanation is useful.