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Option A:
The simplest radical form of x is .
Solution:
Hypotenuse = 16 in
Two sides are 11 in and x.
To find the value of x:
Pythagoras theorem:
In a right angle triangle, the hypotenuse is equal to the sum of the other two sides.
Subtract 121 from both sides of the equation.
Taking square root on both sides of the equation.
Hence option A is the correct answer.
Hence the simplest radical form of x is .