Answer:
Therefore the value of x = 10 units
Step-by-step explanation:
Let label the Triangles first,
Δ ABC a right triangle at ∠ A =90°
Δ ADB andΔ ADC a right triangle at ∠ D =90°
Such that
AD = x
BD = 50
CD = 2
∴ BC = BD + DC = 50 + 2 = 52
To Find:
x = ?
Solution:
In right triangle  By Pythagoras Theorem,

In right triangle Δ ADB andΔ ADC  By Pythagoras Theorem we will have,
AB² =  BD² + AD²
AB² = 50² + x²            ..................equation ( 1 )
and
AC² = DC² + AD²
AC² = 2² + x²             ...................equation ( 2 )
Now in right triangle Δ ABC,
BC² = AB² + AC²
Equating equation  (1 ) and ( 2 ) and the given value we get
52² = 50² + x² + 2² + x²
∴ 2x² = 2704 - 2504
∴ 2x² =200
∴ 
 Therefore the value of x = 10 units
 
        
             
        
        
        
The length of the sides would be 11.
11 * 11 = 121
Hope this helps!
        
             
        
        
        
The first one. The x values repeat
        
                    
             
        
        
        
Julia could use the knuckle on her thumb to the thumb top which is approximately an inch and use that to measure.