Name________________________

 

VOLUME OF A TRIANGULAR PRISM  #2--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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8 in

 
1)                                                              2)                                                         3)

                                                                                                  

9 in

 

4 in

 

2 in

 
                                                                                                           

4 in

 
 


4 in

 

5 in

 

4 in

 
                                                                                                                                                                                   

 

 

 

Volume =  _______80______     Volume =  _____32________                     Volume =  ____72_________

 

 

 

 

9 in

 
4)                                                              5)                                                         6)

                                                                                                  

6 in

 

5 in

 

1 in

 
                                                                                                           

5 in

 
 


6 in

 

12 in

 

6 in

 
                                                                                                                                                                                   

 

 

 

Volume =  _______120______               Volume =  ______54_______                     Volume =  _____90________

                                                           

9 in

 
7)                                                              8)                                                         9)

                                                                                                  

8 in

 

8 in

 

3 in

 
                                                                                                           

3 in

 
 


6 in

 

11 in

 

4 in

 
                                                                                                                                                                                   

           

                                               

Volume =  _______54______     Volume =  ___356______               Volume =  _______48______