Circumference

The circumference of a circle is the distance around the edge of the circle. It is similar to the perimeter of other shapes, such as rectangles or squares, but specifically refers to the distance around a circle.

Formula for Circumference

The formula for finding the circumference of a circle is:

C = 2πr

where C is the circumference, π (pi) is a constant approximately equal to 3.14159, and r is the radius of the circle.

Study Guide

1. Understand the concept: Make sure you understand that the circumference is the distance around the circle, and how it is different from the area of the circle.
2. Learn the formula: Memorize the formula C = 2πr, and understand what each symbol represents.
3. Practice with examples: Work through practice problems to calculate the circumference of circles with different radii.
4. Use π (pi): Understand the significance of π and how it is used in the formula to find the circumference.
5. Real-life applications: Look for real-life examples where understanding the circumference of a circle is important, such as in engineering or design.

By understanding the concept of circumference and practicing with the formula, you can become proficient in calculating the distance around a circle.