Finding Radius and Diameter from Circumference

This video tutorial explains how to find the radius and diameter of a circle when given the circumference. It covers the formulas for circumference in terms of diameter and radius, and provides multiple examples to illustrate the process of solving for the missing values. The tutorial also includes examples where the circumference is given in terms of Pi, demonstrating how to handle such cases.

What is the first step in solving for the radius or diameter when given the circumference?

• Substitute the given information

• Solve for the missing value

• Determine if solving for radius or diameter

• Write out the formula

Which formula is used to find the diameter when given the circumference?

• C = r/2π

• C = πd

• C = 2πr

• C = d/π

If a circle has a circumference of 25.12 cm, what is its diameter?

• 7 cm

• 8 cm

• 6 cm

• 9 cm

What is the radius of a circle with a circumference of 62.8 cm?

• 8 cm

• 9 cm

• 10 cm

• 11 cm

Which formula is used to find the radius when given the circumference?

• C = 2πr

• C = πd

• C = r/2π

• C = d/π

What is the diameter of a circle with a circumference of 28.26 meters?

• 10 meters

• 9 meters

• 8 meters

• 7 meters

If a circle has a circumference of 12.56 inches, what is its diameter?

• 5 inches

• 6 inches

• 4 inches

• 3 inches

What is the radius of a circle with a circumference of 21.98 cm?

• 3.5 cm

• 3 cm

• 4 cm

• 4.5 cm

How do you handle a circumference given in terms of π when finding the diameter?

• Divide by π

• Multiply by π

• Add π

• Subtract π

What is the radius of a circle with a circumference of 18π feet?

• 8 feet

• 7 feet

• 9 feet

• 10 feet