Right triangle PQR is the base of the prism in the figure above. If PQ=PR=âˆš14 and the height of the prism is 8, what is the volume of the prism? Choose the correct choice.
A) 12  B) 45  C) 87  D) 56  E) 23

Rationale: "volume of prism = area of base * height = 1 / 2 * ( square root of 14 ) * ( square root of 14 ) * 8 = 56 answer : d"
Answer: D