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A trapezoid has an area of 145.5 square miles. One base is 19.1 miles long. The height measures 10 miles. What is the length of the other base?

 miles

 Dec 5, 2019
 #1
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Area  of a trapezoid  =  (1/2) (height) ( sum of parallel  base lengths)

 

So

 

145.5  =  (1/2) (10) (19.1  +  other base length)     

 

145.5 =  5 (19.1  +  other base length)      divide both sides by 5

 

29.1  =  19.1  +   other base length      subtract   19.1  from both sides

 

10 miles   = other base length

 

 

cool cool cool

 Dec 5, 2019

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