Intermediate Test Prep Math 8 (Grade-6) Circumference.

Circumference
Lesson
Topic Index | Grade 6 Math | Intermediate Test Prep | StudyZone

Circumference is the word used to describe the distance around the outside of a circle.

A circle is a closed curve that is made of points that are the same distance from the center.

Some Parts of a Circle

Example 1:

Fred, the amazing elephant, is walking on a circular ball as part of his circus act. The diameter of the ball is 10 feet. What is the circumference of the ball?

The circumference of a circle is approximately three times the diameter.

The diameter is 10 feet. 10 feet x 3 = approximately 30 feet.

Circumference = approximately 30 feet

Example 2: using string to estimate the circumference of a circle.

Step 1:

Trace a circle on a piece of paper.
Place a piece of string around the edge of the circle.
Cut the string and measure the length to find the circumference.

Step 2:

Cut another length of string that measures the diameter.
The circumference should be about three times as long as the diameter.

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Remember: The circumference of a circle is approximately three times the diameter.

Topic Index | Grade 6 Math | Intermediate Test Prep | StudyZone