Find circumference with radius 2: C = 2πr; with π ≈ 3.14.

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Study for the GMAS 6th Grade Mathematics Test. Prepare with flashcards and multiple choice questions, each with hints and explanations. Get ready for your exam!

Multiple Choice

Find circumference with radius 2: C = 2πr; with π ≈ 3.14.

Explanation:
Using the circumference formula C = 2πr, plug in the radius r = 2 and π ≈ 3.14. Multiply: 2 × 3.14 × 2 = 12.56. So the circumference is 12.56. This sticks to the given radius and the π approximation, giving the exact result for this setup. If a different π value were used or if you switched to diameter in the formula, you’d get a different number, which is why this calculation matches the given conditions.

Using the circumference formula C = 2πr, plug in the radius r = 2 and π ≈ 3.14. Multiply: 2 × 3.14 × 2 = 12.56. So the circumference is 12.56. This sticks to the given radius and the π approximation, giving the exact result for this setup. If a different π value were used or if you switched to diameter in the formula, you’d get a different number, which is why this calculation matches the given conditions.

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