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Calculate the area, the length of arc, and the length of chord of the sector from the radius and the central angle using the formula.
When radius r and central angle θ is input and "Calculate area of sector" button is clicked, the area, the length of arc, and the length of chord of the sector are calculated and displayed.
Area of a sector of the radius r is 1, and a central angle θ is 60°
Area S: 0.5235987755983
Circular arc length L: 1.0471975511966
Length of chord a: 1
Circular arc length L: 1.0471975511966
Length of chord a: 1
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