Answer:
Whre is the pic??
for me
Xy=10
then In a 45°-45°-90° tri angle the length of the hypotenuse is equal to the lenght of a leg times √2. now Since The tri angle is isoceles The two Sides are equal.
XY=10 then YZ=10 also
the hypotenuse XZ=10√2
now you could Find the perimeter good luck
