Let us consider a circle of radius r
Let Angle subtended by whole circle at center be θ
Length of arc = Circumference of circle = 2πr
Now,
We know that
θ = l/r
θ = 2πr/r
θ = 2π
∴ Angle at center of circle in Radians is 2 π
Radian measure - Conversion
Last updated at Dec. 16, 2024 by Teachoo
Let us consider a circle of radius r
Let Angle subtended by whole circle at center be θ
Length of arc = Circumference of circle = 2πr
Now,
We know that
θ = l/r
θ = 2πr/r
θ = 2π
∴ Angle at center of circle in Radians is 2 π
Let us consider a circle of radius r Let Angle subtended by whole circle at center be Length of arc = Circumference of circle = 2 r Now, We know that = l/r = 2 r/r = 2 Angle at center of circle in Radians is 2