The side of an isosceles triangle is 2, the angle at the apex opposite to the base is 120.

The side of an isosceles triangle is 2, the angle at the apex opposite to the base is 120. Find the diameter of the circumscribed circle.

Find the radius of the circle through the value of the side and the angle at the base:
r = a * cos 30 ° * tg 15 ° = 2 * 0.27 * 0.87 = 0.47;
d = 2 * r = 0.94.



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