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NotTheSmartest  Mar 15, 2017
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The angle across from the side with a length of 7 = 45°.....and the angle across from y is the same....so.....if two angles in a triangle are equal, so are the sides opposite those angles.....so.....y = 7

 

In a 45 - 45 - 90 triangle....the hypotenuse (x)  =   the length of either leg*sqrt (2)....so

x =  7sqrt(2) ≈ 9.9 

 

 

cool cool cool

CPhill  Mar 15, 2017

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