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ABC is a triangle, in which angle-B=2angle-C. D is a point on side BC such that AD bisects angle-BAC and AB=CD. Prove that angle-BAC=72°. |
| Answer» ABC is a triangle, in which angle-B=2angle-C. D is a point on side BC such that AD bisects angle-BAC and AB=CD. Prove that angle-BAC=72°. | |