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Question : $\angle A$ of $\triangle ABC$ is a right angle. $AD$ is perpendicular on $BC$. If $BC= 14$ cm and $BD= 5$ cm, then measure of $AD$ is:

Option 1: $2\sqrt5$ cm

Option 2: $\sqrt5$ cm

Option 3: $3\sqrt5$ cm

Option 4: $3.5\sqrt5$ cm


Team Careers360 19th Jan, 2024
Answer (1)
Team Careers360 22nd Jan, 2024

Correct Answer: $3\sqrt5$ cm


Solution :

AD 2 = CD × BD
⇒ AD 2 = 9 × 5
⇒ AD 2 = 45
⇒ AD = $\sqrt{45}$ = $3\sqrt5$
Hence, the correct answer is $3\sqrt5$ cm.

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