ABC is a triangle and DE is drawn parallel to BC cutting the other sides at D and E. If AB = 3.6 cm, AC = 2.4 cm and AD = 2.1 cm, then AE equal to -
In triangle ABC, points D and E lie on sides AB and AC respectively such that DE is parallel to BC. If AB = 3.6 cm, AC = 2.4 cm and AD = 2.1 cm, then AE is equal to ____.