Check sibling questions

In an equilateral triangle ABC, D is a point on side BC such that BD = 1/3 BC. Prove that 9 AD 2 = 7 AB 2


This question is exactly same as Ex 6.5, 15 of Chapter 6 Class 10 in the NCERT Book.

Please check the answer and video here

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.