Learn why 3.14 is used to calculate the circumference of a circle 02:34 Finding the circumference of circle. Example 3 00:20 Finding the circumference of circle on your own! Example 1 01:55 Finding the circumference of circle on your own! Example 2 01:44 Formulas for the circumference of a semicircle & quarter circle 02:05 Finding the circumference of part of a circle Example 1 01:33 Finding the circumference of part of a circle Example 2 01:32 Finding the circumference of part of a circle Example 3 01:30 Ex 1 Finding the diameter of the circle from its circumference 01:27 Ex 2 Finding the diameter of the circle from its circumference 01:18 Using a number line to find a circumference. Example 1 00:55 Using a number line to find a circumference. Example 2 00:51 Learn the formulas to calculate the circumference of a circle 00:50 Finding the circumference of shapes. Example 1 00:23 Finding the circumference of shapes. Example 2 00:16 Learn to use the formula to find the perimeter & circumference 01:28 Finding the circumference of circle. Example 1 01:43 Finding the circumference of circle. Example 2 01:46