In a right-angled triangle, the hypotenuse is 10cm, and one of the legs is 8cm. Find the second leg.

univerkov | January 9, 2021 | education

Here you need to use the Pythagorean theorem.
hypotenuse ^ 2 = first leg ^ 2 + second leg ^ 2
Substitute the numbers:
10 ^ 2 = 8 ^ 2 + second leg ^ 2
100 = 64 + second leg ^ 2
second leg = √ 100-64
second leg = √36
second leg = 6.
Answer: 6.

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