The diameter of a circle is 22 millimetres. What is the circle's area?Use 𝜋 ≈ 3.14 and round your answer to the nearest hundredth.
Question
The diameter of a circle is 22 millimetres. What is the circle's area?
Use
and round your answer to the nearest hundredth.
Solution
Step 1: Understand the formula for the area of a circle. The formula is A = πr², where A is the area, r is the radius, and π is a constant approximately equal to 3.14.
Step 2: Find the radius of the circle. The radius is half of the diameter, so in this case, the radius is 22 mm / 2 = 11 mm.
Step 3: Substitute the radius into the formula. A = π * (11 mm)² = π * 121 mm².
Step 4: Calculate the area. A = 3.14 * 121 mm² = 379.94 mm².
Step 5: Round the answer to the nearest hundredth. The area of the circle is approximately 379.94 mm².
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