# 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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