Formula deep page
Area of Semi-circle
A = πr²/2
This formula belongs to the chapter "Perimeter and Area" in Class 7 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: A = 154/2 = 77 cm²