Q5. (i) In a triangle ABC, AB = AC and ∠A 36°. If the internal bisector of ∠C meets AB at point D. Prove that AD = BC.
Q8. ABC and DBC are two isosceles triangles on the same side of BC. Prove that:
(i) DA (or AD) produced bisects BC at right angle.
(i) ∠BDA = ∠CDA.
