+0  
 
0
144
1
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Can someone help me? I'm not sure how to approach this and I feel like i've followed the formulas correctly. Thank you!

Guest Mar 6, 2018
 #1
avatar+92895 
+1

When we have a right triangle like this...we have the following relationship

 

12/ height =  height/ 9       cross-multiply

 

108  =  height^2       take the positive root

 

√108  = height 

 

Using the Pythagorean Theorem.....

 

y  = √  [ (√108)^2  + 12^2 ]

 

y  = √  [ 108 + 144]

 

y  =  √252  =  √ { 7 * 36 ]   =  6 √ 7

 

 

 

cool cool cool cool

CPhill  Mar 6, 2018

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