Question

What is the value of x?
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Answer 1

Use the Pythagorean theorem.

a² + b² = c²

c is the hypotenuse which is 13.

a and b are either x and 12, so i put a as x and 12 as b

x² + 12² = 13²

x² + 144 = 169

x² = 25

x = 5