The ratio of the radii of two circles is 4:9. What is the ratio of their circumferences?

Question

Fastieh · Answer

It will be 4:9 as well. Circumference = 2πr, r1 : r2 = 4:9 so this means that 2πr1 : 2πr2 = 4:9, because 2π = constant

runescapememo8 · Answer

4/9; ratio is still the same 20 charrrrrrrrrrrr

Fastieh · Answer

The ratio of the circumferences of the two circles is 4:9, the same as the ratio of their radii. This is determined by using the formula for circumference and applying the given ratio of radii. Hence, the relationship between the radii and circumferences remains consistent in circles. 
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The ratio of the radii of two circles is 4:9. What is the ratio of their circumferences?

Answer (3)

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