I think it’s square because there is a cross section on the two sides of the square that are parallel to each other :)
Answer:
x = 
Step-by-step explanation:
We know that;
The triangle is isosceles, and the hypotenuse is x, the un-labeled side is 5.
Therefore we can say;
5² + 5² = x²
25 + 25 = x²
50 = x²
= x
We can simplify this further;
= 
= 
Hope this helps!
Soory cant help to advanced
x=34 is the correct answer!