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# 7 Circumference Worksheets in Metric Units

## Find the Area and Circumference with the Known Radius

Metric circumference worksheets. The answers to the worksheets are on the second page of the PDF. The radius is given in cm, use the forumlas to calculate the area and the circumference of the various circles. Units are in centimeters.

### 1. Circumference Worksheet 1 of 7

D. Russell
These worksheets are for use with those students or educational jurisdictions who use metric units of measurement. Although all students will benefit being able to use both imperial and metric units of measurement. The radius is given and the circumference and area of the circle have to be calculated given the information provided.

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 r2

Use the formulas given to answer the questions.

### 2. Circumference Worksheet 2 of 7

D. Russell
Questions like these are typically found in the seventh or eighth grade and reviewed early in high school. Although calculators will produce the information required, it is important for learners to understand and make the connections required in order to determine the circumference, area and radius of a circle based on information given.

Previous knowledge needed include: understanding measurement units, understanding of diameter, circumference and radius as well as understanding how to apply a formula. Some familiarity using formulas to calculate perimeter and area of squares, rectangles, trapezoids, parrallelegrams and cylinders are all prerequisites to using these worksheets.

Although some teachers require students to memorize formulas. I do not think students need to memorize all the formulas given the amount of information required from students today, however, I think it's important to remember the value of the constant pi 3.14 (Even though Pi is 3.14159265358979323846264.... students should remember 3.14 and that it's infinite. Students should be able to determine what formula is needed and they should be able to look the forumula up if they haven't memorized it. There is great skill in being resourceful!

Once the worksheets have been completed, it is worth checking with the answer sheets or using a calculator to check the final answers.

### 3. Circumference Worksheet 3 of 7

D. Russell
Worksheets provide practice of specific concepts and skills in math. When children are able to complete a variety of questions with accuracy, it is believed the concept is understood. However, to ensure it's retained, the concept should be visited annually.

D. Russell

D. Russell

D. Russell

### 7. Circumference Worksheet 7 of 7

D. Russell

Deb Russell
Mathematics Guide