# Find the length of the leg BC of a right-angled triangle ABC with a right angle C if it is known that

December 28, 2020 | education

| **Find the length of the leg BC of a right-angled triangle ABC with a right angle C if it is known that: AB = 10 cm, angle A = 60 degrees.**

AB is the hypotenuse

If in our triangle C = 90 gr

A = 60 g, then B = 30 g

There is such a property, straight. treug. the side opposite to the angle of 30 degrees is equal to half of the hypotenuse. 2AC = AB

AC = 5

By the Pythagorean theorem, we get that BC = root of 75 or 5 roots of 3

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