Chords

Geometry Level 3

The points \(A_1,A_2,A_3,A_4\) and \(A_5\) divide a unit circle (circle of radius 1) into five equal parts. Find the value of the square of the product of the chords \(A_1A_2,A_1A_3\). That is, find the value of \((A_1A_2 \times A_1A_3)^2\).

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