Area of Circle
A = πr²Area = π × radius²
Example
≈ 153.94
Circumference of Circle
C = 2πrCircumference = 2 × π × radius
Example
≈ 43.96
Diameter & Radius
d = 2rDiameter = 2 × radius
Example
d = 14
Arc Length
L = (θ/360) × 2πrArc = (angle/360) × circumference
Example
≈ 10.99
Area of Sector
A = (θ/360) × πr²Sector = (angle/360) × area of circle
Example
≈ 38.48
Chord Length
chord = 2r sin(θ/2)Length of a chord from radius and central angle
Example
10