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Calculate Area of Circles: Formulas and Examples

Learn how to find the area of a circle using the formula A = πr^2. Step-by-step guide with examples and practice problems.

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Calculate Area of Circles: Formulas and Examples

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  1. Area of Circles Return to table of contents

  2. Area of a Circle The Area (A) of a Circle is found by solving the following formula:

  3. Find the area of the circle. A = πr2 1. Substitute the radius into formula. A = π (7)2 2. Use 3.14 as an approximation for π. A = 3.14(49) A = 153.86 cm2 3. Don't forget to label the units as square units. 7 cm

  4. 77 What is the Area (A) of a Circle with a radius (r) of 8 m? 8 m

  5. 78 What is the Area (A) of the circle?

  6. 79 What is the Area (A) of the circle?

  7. 80 A circular sprinkler sprays water with a radius of 11 ft. How much area can the sprinkler cover?

  8. 81 What is the area of a circle with a diameter of 24 yds?

  9. 82 What is the radius of a circle whose area is 254.34 mm2?

  10. 83 A circular pool has an area of 153.86 ft2. What is its diameter?

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