Mathematics for IGCSE & O level - Equations (Section 5 - No. 37) | ExamPlay

Mathematics for IGCSE & O level - Equations (Section 5 - No. 37)

If the circumference of a circle is 2πr and its radius is 3, what is the circumference?

6π

9π

3π

12π

Vysvětlení

Substituting r=3 into 2πr yields 2 * π * 3= 6π.

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