<span>The square is equal so all sides have equal sides. Soooo...
s2 (s squared) + s2 = 15 (squared)
15 x 15 = 225
225/2 = 112.5
Now you just have to get the square root. So go onto ur calculator. Which equals 10.606
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Let the event 
The the probability of the events


The conditional probability

Pretty sure the answer is 18
3^2+3^2=9+9=18 (with a square root)