Learn how to solve for radius r in the formula for circumference of a circle

The video tutorial explains how to solve for the radius (R) in the circumference equation of a circle, C = 2πR. It begins by introducing the equation and the importance of solving for R in geometry. The tutorial then guides viewers through the process of isolating R by dividing both sides of the equation by 2π, resulting in R = C / 2π. Finally, it demonstrates how to apply this solution by substituting the circumference value to find the radius.

What does the variable 'R' represent in the equation for the circumference of a circle?

• The volume of the circle

• The area of the circle

• The radius of the circle

• The diameter of the circle

What operation is necessary to isolate the radius (R) in the equation C = 2πR?

• Multiply both sides by 2π

• Subtract 2π from both sides

• Divide both sides by 2π

• Add 2π to both sides

After dividing both sides of the equation by 2π, what is the resulting formula for the radius?

• R = 2π - C

• R = C * 2π

• R = C / 2π

• R = 2π / C

If the circumference of a circle is known, how can you find the radius?

• Add 2π to the circumference

• Subtract 2π from the circumference

• Multiply the circumference by 2π

• Divide the circumference by 2π

What is the purpose of solving the equation for the variable R?

• To calculate the radius when the circumference is known

• To find the diameter of the circle

• To measure the volume of the circle

• To determine the area of the circle