Formula deep page
Circumference of Circle
C = 2πr = πd
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=7cm: C = 2×22/7×7 = 44 cm