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A trapezoid has a height of 6 inches, a base length of 9 inches, and an area of 72 square inches. What is the length of the other base?

 Feb 24, 2020
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Areatrapezoid   =    (1/2) height *  (sum of base lengths)

 

So we have

 

72  =(1/2) (6)  ( 9  +  B)         where B is the  unknown base lenght....simplify

 

72   =  3 ( 9  +  B)             divide both sides  by  3

 

24  =  9 +  B               subtract  9  from  both sides

 

15 =  B  = the length of the other base

 

 

cool cool cool

 Feb 24, 2020

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