Formula deep page
Hemisphere
CSA=2πr² | TSA=3πr² | V=2/3 πr³
This formula belongs to the chapter "Surface Areas and Volumes" in Class 9 Mathematics. Use it after identifying the right variables, matching the chapter context, and writing the substitution clearly.
How to use it
- Identify the quantity you need to find.
- Check the related variables and units from the question.
- Substitute values carefully into the formula.
- Simplify step by step and write the final statement.
Worked cue
r=7: TSA=3×22/7×49=462 cm²