Diameter of a circle
- A description and explanation of what the diameter of a circle is and how to calculate other measurements from the diameter.
Circumference of a circle
- Definition of circumference of a circle, how to find it, and some interesting facts about circumference.
Area of a circle
- The definition of area of a circle as well as explanations of how to find the area of a circle is shown with several formulas.
Questions answered by this video:
What is the circumference of a circle?
What is the formula for the circumference of a circle?
What is the exact circumference of a circle if its radius is 5 feet?
How can you approximate the circumference of a circle using 3.14 as pi?
How do you find the area of a circle?
What is the formula for the area of a circle?
How do you find the exact area of a circle if its radius is 5 feet?
How can you approximate the area of a circle using 3.14 as pi?
How can you remember the formulas for circumference and area of a circle?
How can you find the exact circumference and area of a circle if r = 3?
Staff Review
Currently 4.0/5 Stars.
This idea of circumference / distance around / perimeter of a circle is explained in this lesson. An example problem of finding the circumference of circles is shown and explained. This is a good introductory tutorial on finding circumference. Area of a circle is also explained and an example problem is shown.