Use the image to answer the question.

An illustration shows a triangle with sides measuring 21, 17, and 10. A perpendicular line, from the side measuring 21 to the opposite angle, measures 8. A right angle symbol is shown to the left of the perpendicular line.

A prism and a pyramid both have this triangular base. If both shapes have the same height and the volume of the prism is 1,092 cubic units, what is the volume of the pyramid?

(1 point)
Responses

364 cubic units
364 cubic units

3,276 cubic units
3,276 cubic units

1,092 cubic units
1,092 cubic units

728 cubic units

1 answer

To find the volume of a pyramid that has the same triangular base and height as a prism with a volume of 1,092 cubic units, we can use the fact that the volume of a pyramid is one-third of the volume of a prism with the same base area and height.

The formula for the volume of a prism is given by:

\[ V_{\text{prism}} = \text{Base Area} \times \text{Height} \]

And the formula for the volume of a pyramid is:

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

Since the height of both the prism and the pyramid is the same and the base area is the same, we can express the volume of the pyramid in terms of the volume of the prism:

\[ V_{\text{pyramid}} = \frac{1}{3} V_{\text{prism}} \]

Given that the volume of the prism \(V_{\text{prism}} = 1,092\) cubic units, we can substitute this value into the equation:

\[ V_{\text{pyramid}} = \frac{1}{3} \times 1,092 \]

Calculating this gives:

\[ V_{\text{pyramid}} = 364 \text{ cubic units} \]

Therefore, the volume of the pyramid is 364 cubic units.