Calculating Area and Circumference of Circles

This video tutorial by Todd from Land of Math covers the basics of circles, including key terminology such as radius, diameter, circumference, and area. It explains how to calculate the circumference and area of a circle using both the radius and diameter. The video provides examples and practice problems to reinforce the concepts, encouraging viewers to pause and try solving them independently. The tutorial concludes with a call to action for viewers to like, subscribe, and visit the website for more math content.

What is the term used to describe the line from the center of a circle to its edge?

• Area

• Circumference

• Diameter

• Radius

Which formula is used to calculate the circumference of a circle when the diameter is known?

• Radius squared

• Pi * Diameter

• 2 * Pi * Radius

• Pi * Radius

If the radius of a circle is 3 meters, what is the circumference using Pi as 3.14?

• 6.28 meters

• 9.42 meters

• 18.84 meters

• 12.56 meters

How do you find the area of a circle?

• Pi * Radius squared

• Pi * Diameter squared

• Pi * Diameter

• 2 * Pi * Radius

What is the area of a circle with a radius of 4 meters using Pi as 3.14?

• 100.48 square meters

• 12.56 square meters

• 25.12 square meters

• 50.24 square meters

If the diameter of a circle is 10 meters, what is the radius?

• 20 meters

• 5 meters

• 10 meters

• 15 meters

Calculate the circumference for a circle with a diameter of 8 meters using Pi as 3.14.

• 50.24 meters

• 6.28 meters

• 12.56 meters

• 25.12 meters

What is the area of a circle with a diameter of 14 meters using Pi as 3.14?

• 153.86 square meters

• 615.44 square meters

• 76.93 square meters

• 307.72 square meters

If a circle has a radius of 6 meters, what is its diameter?

• 12 meters

• 3 meters

• 18 meters

• 6 meters

For a circle with a radius of 9 meters, calculate the area using Pi as 3.14.

• 76.93 square meters

• 127.17 square meters

• 508.68 square meters

• 254.34 square meters