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 that feature hints and explanations. Equip yourself for success!

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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