Diameter and Radius Relationships

The video tutorial explains how to find the diameter and radius of a circle using simple formulas. It begins with an introduction to the concepts of diameter and radius, followed by a step-by-step guide to calculating the diameter when the radius is given. The tutorial then demonstrates how to find the radius when the diameter is provided. The video concludes with a recap of the formulas and ensures that students understand the methods used.

If the radius of a circle is 4 cm, what is the diameter?

• 16 cm

• 8 cm

• 4 cm

• 2 cm

What is the formula to calculate the diameter from the radius?

• Diameter = Radius - 2

• Diameter = Radius + 2

• Diameter = Radius x 2

• Diameter = Radius / 2

Given a diameter of 32 cm, what is the radius?

• 64 cm

• 32 cm

• 16 cm

• 8 cm

How do you find the radius if the diameter is known?

• Radius = Diameter x 2

• Radius = Diameter / 2

• Radius = Diameter - 2

• Radius = Diameter + 2

Which of the following is true about the relationship between diameter and radius?

• Radius is equal to the diameter

• Diameter is twice the radius

• Radius is twice the diameter

• Diameter is half of the radius