Math

Clever method to solve a tricky geometry problem!

Can you solve this geometry problem? Thanks to Lucas from Brazil for the suggestion!

Kangaroo Maths 2020
https://www.matematica.pt/en/docs/kangaroo/enunciados/2020/2020_Grade9-10.pdf
Proof of inscribed angle theorem
https://www.khanacademy.org/math/geometry/hs-geo-circles/hs-geo-inscribed-angles/a/inscribed-and-central-angles-proof

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