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Use the Pythagorean Theorem.
12
To find the missing side of the triangle, we will use the Pythagorean Theorem. a^2+b^2=c^2In the formula, a and b are the legs and c is the hypotenuse of a right triangle. We are given a triangle with a=x, b=5, and c=13.
Let's substitute these values into the formula.
Substitute values
Calculate power
LHS-25=RHS-25
sqrt(LHS)=sqrt(RHS)
Since a negative side length does not make sense, we only need to consider positive solutions.