mmmmzzz7917 mmmmzzz7917 29-12-2023 Mathematics contestada Bisectors of angles ∠A,∠B and ∠C of a triangle ABC intersect its circumcircle at D,E and F respectively. Prove that the angles of the triangle DEF are90∘−12∠A,90∘−12∠B and 90∘−12∠C