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Maths Exercices
Using the Pythagorean Theorem to find a missing leg

We can use the Pythagorean theorem to find a missing leg of a triangle, but only if we know the length measure of the hypotenuse and the other one of the legs.

Find x

52=32+x2
x2=52-32
x2=25-9
x2=16
x=4


In a right triangle you know the hypotenuse is 15 units long and one leg is 12 units long.

Calculate the other leg:

Solution: