The distance around a circle is called its circumference.
To find the circumference of a circle, multiply π to the diameter.
Example:
Calculating Circumference
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Question 1 of 6
1. Question
Find the circumference of the following circles.
Correct 15 / 15 PointsIncorrect / 15 Points 
Question 2 of 6
2. Question
A pool is 6.4 meters in diameter. Barry swims across the center of the pool three times.
a) What is the total distance he swam?
b) What is the circumference of the pool?

a) The total distance Barry swam = = m
b) Circumference of the pool
C = = m
Correct 4 / 4 PointsIncorrect / 4 Points 

Question 3 of 6
3. Question
What is a circle?
CorrectIncorrect 
Question 4 of 6
4. Question
What is this symbol π ? Select the correct answer.
Correct 2 / 2 PointsIncorrect / 2 Points 
Question 5 of 6
5. Question
What is the perimeter of these semicircles?
Correct 16 / 16 PointsIncorrect / 16 Points 
Question 6 of 6
6. Question

There are two shapes.
What shapes do you see?
Name them here: (From top to bottom) a and a
The perimeter of the semicircle = half the circumference of a circle
if: C = = cm
therefore the perimeter of the semicircle = cm
The perimeter of the square = = cm
The total perimeter of the shape = = cm
Answer = cm
Correct 10 / 10 PointsIncorrect / 10 Points 