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Example Questions
Example Question #1 : Solid Geometry
If we have a regular (the triangles are equilateral) triangular prism of volume
and the side length of the triangle on either face is , what is the length of the prism? Write your answer in terms of a decimal rounded to the nearest hundredth.
Possible Answers:
Not enough information to decide.
Correct answer:
Explanation:
The volume of a triangular prism can be simply stated as V = A*L, where A is the area of the triangular face and L is the length. We have the volume already and we need to figure out the area of the triangle from the side length.
The area of a triangle is b*h/2, and we are given the base/side length: 3 in. We also have a formula for the height of an equilateral triangle,
. Calculating the area of the triangle we get 2.5981 in^2, so now we just have to plug our numbers into the volume formula.
And that is the final answer.
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