Circles: Diameter, Radius & Area | 7.G.B.4

The video tutorial covers the basic properties of circles, including the diameter, radius, and area. It begins with an introduction to these concepts, followed by a detailed explanation of how to determine the radius from a given diameter. The tutorial then demonstrates how to calculate the area of a circle using the formula involving pi and the radius squared. The video concludes with a summary of the key points discussed.

What is the relationship between the diameter and the radius of a circle?

• The diameter is half the radius.

• The radius is twice the diameter.

• The diameter is twice the radius.

• The radius is equal to the diameter.

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

• 6 inches

• 4 inches

• 3 inches

• 2 inches

How do you calculate the radius of a circle from its diameter?

• Add 2 to the diameter

• Multiply the diameter by 2

• Divide the diameter by 2

• Subtract 2 from the diameter

What is the formula for the area of a circle?

• Area = pi * diameter

• Area = pi * radius

• Area = pi * diameter squared

• Area = pi * radius squared

Given a radius of 3 inches, what is the area of the circle in terms of pi?

• 6 pi square inches

• 9 pi square inches

• 12 pi square inches

• 18 pi square inches