Calculating Diameter from Circumference

This video tutorial explains how to calculate the diameter of a circle when given the circumference. It begins by deriving the formula for diameter as circumference divided by pi. The video then demonstrates this calculation with two examples: a tape measure and a golf ball. The tutorial concludes with a recap of the formula and encourages viewers to subscribe for more math and science content.

What is the relationship between diameter and circumference?

• Diameter is the circumference divided by pi

• Diameter is twice the circumference

• Diameter is half the circumference

• Diameter is the circumference multiplied by pi

How do you isolate the diameter in the formula for circumference?

• Multiply both sides by pi

• Subtract pi from both sides

• Add pi to both sides

• Divide both sides by pi

In the first example, what is the circumference of the tape?

• 3.14 cm

• 14 cm

• 35 cm

• 11.14 cm

What is the calculated diameter of the tape in the first example?

• 11.14 cm

• 14 cm

• 35 cm

• 3.14 cm

Why can't you measure the diameter directly on a sphere like a golf ball?

• The sphere is too small

• The sphere is not a perfect circle

• You can't go directly across the sphere

• The sphere is too large

What is the circumference of the golf ball in the second example?

• 11.14 cm

• 35 cm

• 3.14 cm

• 14 cm

What is the calculated diameter of the golf ball in the second example?

• 3.14 cm

• 35 cm

• 11.14 cm

• 4.5 cm

What is the value of pi used in the examples?

• 3.14159

• 3.14

• 3.1

• 3.1416

What is the formula to calculate diameter from circumference?

• Diameter = Circumference x pi

• Diameter = Circumference / pi

• Diameter = Circumference - pi

• Diameter = Circumference + pi

What is the main takeaway from the video?

• How to measure diameter directly

• How to calculate area from diameter

• How to calculate diameter from circumference

• How to measure circumference