Let a be the radius of the inscribed circle.
b = a+2a
b = 3a units.
c² = 2(3a)²
c = 3√(2)a units.
d = 180-45
d = 135°
Calculating a.
5² = (3√(2)a)²+a²-2*3√(2)a²cos135
25 = 19a²+6a²
25 = 25a²
a = 1 unit.
Again, a is the radius of the inscribed circle.
Calculating length x.
x² = 2a²
x² = 2
x = √(2) units.
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