From the information given, triangle ABC is similar to triangle DEC
This means that
AB/DE = BC/EC = AC/DC
Given that AB = 3, BC = 4 and CE = 14, it means that
3/DE = 4/14
By cross multiplying, it becomes
3 * 14 = 4 * DE
42 = 4DE
DE = 42/4
DE = 10.5
1.6m questions
2.0m answers