IMO 1986 LL CAN9
In a triangle ABC, ngleBAC = 100◦, AB = AC. A point
IMO 1986 LL CAN9
Origin: CAN
Problem
In a triangle ABC, \angleBAC = 100◦, AB = AC. A point D is chosen on the side AC such that \angleABD = \angleCBD. Prove that AD + DB = BC.
In a triangle ABC, ngleBAC = 100◦, AB = AC. A point
Origin: CAN
In a triangle ABC, \angleBAC = 100◦, AB = AC. A point D is chosen on the side AC such that \angleABD = \angleCBD. Prove that AD + DB = BC.