Introduction to Pi (Grade 4)
Explore the concept of Pi and its relationship to circles' circumference and diameter with this Grade 4 math worksheet.
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Introduction to Pi
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Read each question carefully and answer to the best of your ability. Show your work where necessary.
What is Pi?
Pi (π) is a special number that helps us understand circles. It's the ratio of a circle's circumference (the distance around the circle) to its diameter (the distance across the circle through the center). No matter how big or small a circle is, if you divide its circumference by its diameter, you always get approximately 3.14!
1. Pi is the ratio of a circle's to its .
2. The approximate value of Pi is .
3. The distance around a circle is called its .
4. Which of these is the correct symbol for Pi?
P
π
T
alpha
5. If a circle has a diameter of 10 cm, its circumference is about:
3.14 cm
31.4 cm
10 cm
5 cm
6. Look at the circle above. If its diameter is 16 units, what is its approximate circumference? Explain your answer.
7. Pi is an exact number that never changes.
True
False
8. You can find the circumference of any circle by multiplying its diameter by Pi.
True
False