Question

The area of a circle is 36 square units. What is its circumference?

Type the correct answer in the box. Use numerals instead of words.
The circumference is
units.

Answer 1

21.27 units

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Use the formula:

• C = 2πr, where C is the circumference and r is the radius

We are given the area of the circle, which is 36 square units.

The formula for the area of a circle is:

• A = πr²

Setting the area equal to 36, we have:

• πr² = 36
• r² = 36/π
• r =
  `√(36/\pi)` units

Now, we can use the circumference formula to find:

• C = 2π
  `√(36/\pi)` = 21.27 units