In ∆ABC, the bisector of ∠A intersects side BC at D. If AB = 12 cm, AC = 15 cm and BC= 18 cm, then the length of BD is:
379 064b8f27388d5e4f52ddefb25In ΔABC, if G is the centroid and AD is a median with length 9 cm, then the length of AG is:
370 0644772d9e2eff5686888ad9b