Circles And Circular Figures: Calculating the circumference of a circle

The video tutorial explains how to calculate the circumference of a circle using both the diameter and the radius. It provides examples with different units of measurement and discusses practical applications, such as measuring around a swimming pool. The tutorial emphasizes the use of π (Pi) and its approximation for calculations, highlighting the importance of understanding these concepts for real-world applications.

What is the circumference of a circle with a diameter of 9 feet using π approximated to 3.14?

• 28.26 feet

• 18.84 feet

• 25.12 feet

• 31.42 feet

If a circle has a diameter of 2 centimeters, what is its circumference using π approximated to 3.14?

• 6.28 centimeters

• 3.14 centimeters

• 12.56 centimeters

• 9.42 centimeters

Why is knowing the circumference of a circle useful in practical scenarios?

• It helps in calculating the area of the circle.

• It is useful for measuring the distance around circular objects.

• It is used to find the radius of the circle.

• It determines the volume of the circle.

Which formula should be used to calculate the circumference when the radius is given?

• D/2

• πR²

• 2πR

• πD

What is the circumference of a circle with a radius of 3 meters using π approximated to 3.14?

• 18.84 meters

• 9.42 meters

• 28.26 meters

• 12.56 meters