Name________________________

VOLUME OF A TRIANGULAR PRISM  #1--KEY

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Directions:  Find the volume of each right triangular prism below.  First find the area of the triangular base (1/2 x base x height).  Then multiply this area times the height of the prism.  For example in #1, the base is 5 and the height of the triangle is 6, so ½ x 5 x 6 = 15.  Then multiply this area times the height of the prism, which is 2 inches.

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 5 in

1)                                                              2)                                                         3)

 9 in

 2 in

 2 in

 3 in

 4 in

 5 in

 3 in

Volume =  _______30______     Volume =  _____20________                     Volume =  ____40.5_______

 5 in

4)                                                              5)                                                         6)

 8 in

 1 in

 2 in

 4 in

 7 in

 6 in

 4 in

Volume =  _______32______     Volume =  ______15_______                     Volume =  _____112_______

 7 in

7)                                                              8)                                                         9)

 8 in

 2 in

 3 in

 3 in

 6 in

 7 in

 3 in

Volume =  _______36______     Volume =  ___73.5______              Volume =  _______36______