MathDB
Wot n' Intersection

Source: 2017 AIME I #6

March 8, 2017
2017 AIME IWot n

Problem Statement

A circle is circumscribed around an isosceles triangle whose two congruent angles have degree measure xx. Two points are chosen independently and uniformly at random on the circle, and a chord is drawn between them. The probability that the chord intersects the triangle is 1425\frac{14}{25}. Find the difference between the largest and smallest possible values of xx.