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Two sides of a parallelogram are 30 and 20.  One diagonal has a length of 40. What is the length of the other diagonal?

 Jun 28, 2021

Best Answer 

 #1
avatar+33376 
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Parallelogram Law      Sum of squares of four sides   = sum of squares of diagonals   ( Thanx, Chris!)

 

 

30^2 + 20^2 + 30^2 + 20^2 = 40^2 + x ^2        x = sqrt 1000     you can simplify from here !.....

 Jun 28, 2021
edited by ElectricPavlov  Jun 28, 2021
 #1
avatar+33376 
+2
Best Answer

Parallelogram Law      Sum of squares of four sides   = sum of squares of diagonals   ( Thanx, Chris!)

 

 

30^2 + 20^2 + 30^2 + 20^2 = 40^2 + x ^2        x = sqrt 1000     you can simplify from here !.....

ElectricPavlov Jun 28, 2021
edited by ElectricPavlov  Jun 28, 2021

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