As per your syllabus, the unit of PLANE ANGLE in SI is which?
- Degree (°)
- Radian (rad)
- Steradian (sr)
- Gradian (gon)
Show answer and solution
Correct answer: B. Radian (rad)
Your syllabus + Fig 1.1: plane angle = arc/radius → rad.
Supplementary SI unit, dimensionless.