Ratio of Radii is 4:5. find ratio of circum

If the ratio of the radii of two circles is 4:5, we can find the ratio of their circumferences using the formula for the circumference of a circle:

\[
C = 2\pi r
\]

Given that the circumference \( C \) is directly proportional to the radius \( r \), the ratio of the circumferences will be the same as the ratio of the radii.

Therefore, the ratio of the

Learn how to find the ratio of circumferences of two circles when given the ratio of their radii (4:5). This problem explores geometric proportions and uses the formula for circle circumference. Suitable for students in Grades 6-8.

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