HELP PLSSS IT'S A FINALLL!!!!!!!!!!! WILL GIVE BRAINLEST AND 20 POINTS!!!! PLEASE PLEASE PLEASE HELP!!!!

Answer: 25√2 nearest tenth is 35.4
Step-by-step explanation: Phythagorean thrm= 25^2+25^2=(diagonal)^2; diagonal= 25√2. Trig: Sin 45= √2/2; 25/ hyoptenuse = √2/2 hyoptenuse also equals 25√2