Finding the radius when given the circumference

The video tutorial explains how to find the radius of a circle when given the circumference. It begins by introducing the relationship between circumference, diameter, and radius, using the formula C = πD or C = 2πr. The tutorial then demonstrates how to solve for the diameter when the circumference is known, using a given example where the circumference is 24π. Finally, it shows how to calculate the radius from the diameter and verifies the solution, ensuring the understanding of the mathematical process involved.

What is the relationship between circumference and diameter?

• Circumference is π times the diameter

• Circumference is half the diameter

• Circumference is the same as the diameter

• Circumference is twice the diameter

If the circumference of a circle is given as 24π, what is the diameter?

• 36

• 12

• 48

• 24

How do you calculate the radius from the diameter?

• Subtract π from the diameter

• Multiply the diameter by π

• Divide the diameter by 2

• Add π to the diameter

What is the radius of a circle if its diameter is 24?

• 6

• 12

• 24

• 48

Which formula can be used to find the radius if the circumference is known?

• C = 2r

• C = πr

• C = 2πr

• C = r/2