perplexus.info :: Geometry : Decagonal Intersection Delight

Decagonal Intersection Delight (Posted on 2024-04-22)

You are given a regular decagon A₁A₂... A₁₀. Let A be the intersection point of lines A₁A₄ and A₂A₅, B is the point of intersection of lines A₁A₆ and A₂A₇, and C is the point of intersection of lines A₁A₉ and A₂A₁₀. Find the angle of ABC.

No Solution Yet Submitted by Danish Ahmed Khan

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Puzzle Thoughts

Comment 2 of 2 |

< ABC = 90 degrees.

Posted by K Sengupta on 2024-04-22 13:12:06

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