Use pythagorean theorem to find the third side of the SMALLER triangle first.....
Then use the pythagorean theorem to find the hypotenuse of the LARGER triangle
Let me know what you find......
Well...I came up with a different answer than KeyLimePi......
Smaller triangle side.....
1^2 +s^2 = 25
s=sqrt24
Then using the Pythag theorem on the larger triangle: sqrt(24)^2 + 5^2 = Hyp^2
24 + 25 = hyp^2
49= hyp^2
7=? on the larger triangle