High School

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Find the circumference of a circle with a radius of 12 feet. Use 3.14 for pi. Round your answer to the nearest tenth.

A. 37.6 feet
B. 37.7 feet
C. 75.3 feet
D. 75.4 feet

Answer :

Final answer:

The circumference of a circle with a radius of 12 feet, using 3.14 for pi, is calculated as 75.36 feet, which rounds to 75.4 feet. This measurement refers to the perimeter or distance around the circle, not to be confused with area, which is the space within the circle. So, the correct option is D.

Explanation:

The student is asked to find the circumference of a circle with a given radius using 3.14 for pi. The formula for the circumference (C) of a circle is C = 2πr, where π (pi) represents a constant approximately equal to 3.14, and r is the radius of the circle. To calculate the circumference with a radius (r) of 12 feet and using 3.14 as the value for pi, the calculation would be as follows:


C = 2 × 3.14 × 12 feet = 75.36 feet. When rounded to the nearest tenth, the circumference is 75.4 feet. It is important not to confuse the concepts of area and circumference. The area of a circle is calculated with the formula A = πr², representing the space within the circle, while the circumference measures the distance around the circle.

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