### 1. Circumference Worksheet # 1

The circumference of a circle is the length around the circle which is equal to 360°. Pi Π is the number needed to compute the circumference of the circle.

p is equal to 3.14

To find the AREA of a circle, it is equal to 3.14 Π (p) times the radius (r) to the power of 2. The area of a circle formula looks like:

A= Π r^{2}

Use the formulas given to answer the questions.

### 2. Circumference Worksheet # 2

Know the formulas for the area and circumference of a circle and use them to solve problems; give an informal derivation of the relationship between the circumference and area of a circle.

In order for students to complete the worksheets, they will need to understand the following vocabulary: area, formula, circle, perimeter, radius, pi and the symbol for pi, diameter.

Students should have worked with simple formulas on perimeter and area of other 2 dimensional shapes. Students should have had some experience find the perimeter of a circle by doing activities like using string to trace the circle and then measuring the string to determine the perimeter of the circle. There are many calculators that will find the circumference and areas of shapes but it is important for students to be able to understand the concepts and apply the formulas before moving to the calculator.