1. Maintain eye contact to engage the audience.
2. Use a clear and confident tone to convey ideas effectively.
3. Practice active listening for responding to queries.
4. Use visual aids to enhance understanding and maintain interest.
In the adjoining figure, $\triangle CAB$ is a right triangle, right angled at A and $AD \perp BC$. Prove that $\triangle ADB \sim \triangle CDA$. Further, if $BC = 10$ cm and $CD = 2$ cm, find the length of AD. 