App description

Sector (symbol: ⌔), a part of a circle, is surrounded by two radii and an arc. In a smaller area, it is called a small sector, and a larger area is called a large sector. In the right figure, θ is the angular radian of the sector, R is the radius of the circle, and l is the arc length of the small sector.

A sector with an arc of 180° is called a semicircle. Other sectors of circular arc angle are sometimes given special names, including quadrant angle (90°), sextant angle (60°) and octant angle (45°), which are 1/4, 1/6 and 1/8 of the whole circle, respectively.

<img src="http://drr.ikcest.org/static/upload/4d/4dc872b2-27b0-11eb-be12-00163e0618d6_m.jpg" />

Enter any two conditions to find other values.

Usage example

Select the exact number of digits: 4

Radius: 5

Angle: 30°

Click "calculate" to output the result

Arc length: 2.618

Chord: 2.588

Area: 6.545