In ΔABC, ∠BAC = 90° and AD ⊥ BC. If BD = 3 cm and CD = 4 cm, then length of AD is :

A. $$2\sqrt 3 $$ cm

B. 3.5 cm

C. 6 cm

D. 5 cm

Answer: Option A

Solution(By Examveda Team)

We know that,
AD² = CD × BD
AD² = 4 × 3
AD² = 12
AD = $$2\sqrt 3 $$  cm