Let \[ A_1 , A_2,A_3, \ldots, A_n \] be the vertices of a regular \(n\)-sided polygon inscribed in a circle of radius \(R\). If \[(A_1 A_2)^2 + (A_1 A_3)^2 +\cdots + ( A_1 A_n) ^2 = 14R^2,\] find the number of sides of the polygon.

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, interactive explorations.

Used and loved by over 6 million people

Learn from a vibrant community of students and enthusiasts,
including olympiad champions, researchers, and professionals.

Your answer seems reasonable.
Find out if you're right!