1. Flexibility: - Sit and Reach Box: Measures the flexibility of the lower back and hamstrings.
- Goniometer: Measures joint flexibility and range of motion.
2. Weight:
- Weighing Scale: Measures body weight accurately.
- Digital Scale: Provides precise weight measurements with additional features
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. 