Use the image to answer the question.

An illustration shows a triangle with sides measuring 16 meters, 14 meters, and 8 meters. A dashed perpendicular line, from the side measuring 16 meters to the opposite angle, measures 7 meters. A right angle symbol is shown to the left of the perpendicular line.

A prism and pyramid have congruent triangular bases. If their heights are both 15 m, what is the volume of each shape?

(1 point)
The volume of the prism is
m3
.
The volume of the pyramid is
m3
.

1 answer

To find the volumes of the prism and the pyramid, we need to first calculate the area of the triangular base.

The formula for the area \( A \) of a triangle can be given as:

\[ A = \frac{1}{2} \times \text{base} \times \text{height} \]

In this case, we'll take the base of the triangle to be the side measuring 16 meters, and the height is given as 7 meters.

So, the area of the triangular base is:

\[ A = \frac{1}{2} \times 16 , \text{m} \times 7 , \text{m} = \frac{1}{2} \times 112 , \text{m}^2 = 56 , \text{m}^2 \]

Volume of the Prism

The volume \( V \) of a prism is given by:

\[ V = \text{Base Area} \times \text{Height} \]

Substituting the values we have:

\[ V = 56 , \text{m}^2 \times 15 , \text{m} = 840 , \text{m}^3 \]

Volume of the Pyramid

The volume \( V \) of a pyramid is given by:

\[ V = \frac{1}{3} \times \text{Base Area} \times \text{Height} \]

Substituting the values we have:

\[ V = \frac{1}{3} \times 56 , \text{m}^2 \times 15 , \text{m} = \frac{1}{3} \times 840 , \text{m}^3 = 280 , \text{m}^3 \]

Final Answers

  • The volume of the prism is \( 840 , \text{m}^3 \).
  • The volume of the pyramid is \( 280 , \text{m}^3 \).