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

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