perimeter of circle.pptx

To find the Perimeter of circle

1. A new number

2. Regular polygons inside a unit circle

3. No: of Sides Perimeter of regular polygon 3 2.5981 4 2.8284 5 2.9389 6 3.0000 7 3.0372 8 3.0615 9 3.0782 10 3.0902 No: of Sides Perimeter of regular polygon 15 3.1187 20 3.1287 25 3.1333 30 3.1359 35 3.1374 40 3.1384 45 3.1390 50 3.1395

4. Perimeter of a circle of diameter 1 unit is approximately equal to 3.14

5. Perimeter of circle of diameter 1unit = π units Perimeter of circle of diameter 2 units = 2π units Perimeter of circle of diameter 5units = 5π units

6. Perimeter of a circle is π times its diameter. Perimeter of a circle is 2π times its radius.

7. d - diameter r - radius Perimeter of a circle = πd Perimeter of a circle = 2πr