Calculating the Area of a Circle: A Step-by-Step Guide
Learn how to calculate the area of a circle with a 10-inch diameter using a simple formula.
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The area of a 10-inch diameter circle can be calculated using the formula: Area = π * (radius)^2. The radius is half the diameter, so 5 inches. Therefore, the area is π * 5^2 = 25π square inches. Approximating π as 3.14, the area is about 78.5 square inches.
FAQs & Answers
- What is the formula for the area of a circle? The formula for the area of a circle is Area = π * (radius)^2.
- How do you find the radius from the diameter? The radius is half of the diameter; therefore, to find the radius, divide the diameter by 2.
- What is the area of a circle with a 12-inch diameter? To find the area, first calculate the radius which is 6 inches (12/2), then use the formula: Area = π * (6)^2 = 36π square inches, approximately 113.1 square inches.
- Why do we use π in circle calculations? π (pi) is the ratio of the circumference of a circle to its diameter, crucial in calculations involving circles.