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What is the area of a circle with radius r?

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Question: What is the area of a circle with radius r?

Options:

  1. πr^2
  2. 2πr
  3. πr
  4. r^2

Correct Answer: πr^2

Solution: 

The area of a circle is given by the formula A = πr^2.

What is the area of a circle with radius r?

Practice Questions

Q1
What is the area of a circle with radius r?
  1. πr^2
  2. 2πr
  3. πr
  4. r^2

Questions & Step-by-Step Solutions

What is the area of a circle with radius r?
  • Step 1: Understand that a circle is a round shape with all points the same distance from the center.
  • Step 2: Know that the distance from the center to the edge of the circle is called the radius (r).
  • Step 3: Learn the formula for the area of a circle, which is A = πr^2.
  • Step 4: In the formula, π (pi) is a special number approximately equal to 3.14.
  • Step 5: To find the area, you need to square the radius (multiply r by itself) and then multiply that by π.
  • Area of a Circle – The area of a circle is calculated using the formula A = πr^2, where r is the radius.
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