# Find the Following Ratios (I) the Ratio of Radius to Circumference of the Circle. - Algebra

Sum
Find the following ratio.
The ratio of radius to circumference of the circle.

#### Solution

Let the radius of the circle be r units.
∴ Circumference of the circle = 2πr units
Radius of the circle : Circumference of the circle = r : 2πr = r / (2πr) = 1/ (2π) = 1 : 2π
Thus, the ratio of radius to cirumference of the circle is 1 : 2π

Concept: Concept of Ratio
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#### APPEARS IN

Balbharati Mathematics 1 Algebra 9th Standard Maharashtra State Board
Chapter 4 Ratio and Proportion
Practice Set 4.2 | Q 2.1 | Page 63