Calculate the Area of a 20ft Diameter Circle Easily

Learn how to swiftly calculate the area of a 20ft diameter circle using a simple formula.

240 views

The area of a circle is found using the formula A = πr². For a 20ft diameter circle, the radius (r) is half the diameter: 20ft / 2 = 10ft. Plug this into the formula: A = π (10ft)² ≈ 3.14 100ft² = 314 square feet.

FAQs & Answers

  1. What is the formula for the area of a circle? The area of a circle is calculated using the formula A = πr², where r is the radius.
  2. How do I find the radius of a circle given the diameter? To find the radius, divide the diameter by 2. For example, a 20ft diameter circle has a radius of 10ft.
  3. Why is π important in geometry? π (pi) is a constant used to calculate the circumference and area of circles, representing the ratio of the circumference to the diameter.
  4. Can I use this formula for circles of any size? Yes, the formula A = πr² applies to circles of any size, just use the appropriate radius.

Watch More

Interested in more geometry tutorials? Check out our videos on calculating the area of different shapes and mastering math concepts for all levels.

  1. How to Calculate the Area of a Circle with a Diameter of 20 cm Learn how to calculate the area of a circle with a diameter of 20 cm using the radius and the area formula.
  2. How to Calculate the Area of a Circle with an 18 cm Diameter Discover the step-by-step method to find the area of an 18 cm diameter circle using the formula A = πr².
  3. How to Calculate the Area of a Circle: A Step-by-Step Guide Learn the simple formula to calculate the area of a circle using the radius. Perfect for students and math enthusiasts!
  4. How to Calculate the Area of an 8-Inch Diameter Circle Learn how to compute the area of an 8-inch diameter circle using the formula. Easy step-by-step guide for math enthusiasts.
  5. How to Calculate the Area of a Circle with a 12 Diameter Learn how to find the area of a circle with a 12 diameter using the formula A = πr².
  6. How to Calculate the Area of a Circle Using the Radius Learn to find the area of a circle using the radius with the formula A = πr². Discover key details in our short Q&A.