Calculate the area, the length of arc, and the length of chord of segment from the radius and the central angle using the formula.
When radius r and central angle θ is input and "Calculate area of segment" button is clicked, the area, the length of arc, and the length of chord of the segment are calculated and displayed.
![Area of bow shape](/img/area_en/segment.png)
![Formula for area of segment](/img/area_en/segment1.jpg)
![Formula for length of arc of segment](/img/area_en/segment2.jpg)
![Formula for length of chord of segment](/img/area_en/segment3.jpg)
Area of segment of the radius is 1, and a central angle is 60°
Area r: 0.09058607370608
Circular arc length L: 1.0471975511966
Length of chord a: 1
Circular arc length L: 1.0471975511966
Length of chord a: 1