Given a right-angled triangle. one of its legs is 3 cm, and the hypotenuse is 5 cm. Find the second leg.
| May 4, 2021 | education
In order to find the second leg of a right-angled triangle, knowing its hypotenuse and one leg, it is necessary to subtract the square of the known leg from the square of the hypotenuse.
Thus, we get:
a2 = c2 – b2 = 52 – 32 = 25 – 9 = 16.
√а = √16 = 4 cm.
Answer: The length of the second leg is 4 cm.
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