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 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______