Sector Area Calculator | Calculate Area, Arc & Chord Length

Understanding Sector Area, Arc Length, and Chord Length

In geometry, a sector of a circle is the region bounded by two radii and the arc subtended by these radii. Understanding how to calculate the area of this sector, the length of the arc, and the chord length is fundamental in various fields, from mathematics to engineering.

Key Formulas:

• Sector Area: The area of a sector is proportional to the central angle. $$ Area = \frac{\theta}{360} \times \pi r^2 $$ (for degrees) or $$ Area = \frac{\theta}{2\pi} \times \pi r^2 = \frac{1}{2} r^2 \theta $$ (for radians), where \( \theta \) is the central angle and \( r \) is the radius.
• Arc Length: The arc length is the distance along the arc of the sector. $$ Arc Length = \frac{\theta}{360} \times 2 \pi r $$ (for degrees) or $$ Arc Length = r \theta $$ (for radians).
• Chord Length: The chord length is the straight line distance between the two endpoints of the arc. $$ Chord Length = 2r \sin(\frac{\theta}{2}) $$ (where \( \theta \) is in degrees, used in sine function as degrees).

Use Cases:

These calculations are useful in various applications such as:

• Calculating areas of pizza slices or pie charts.
• Designing curved structures in architecture and engineering.
• Navigation and surveying, especially in calculating distances along curves.
• Computer graphics and game development for creating circular segments and arcs.

This calculator simplifies these calculations, allowing you to quickly find the sector area, arc length, and chord length for your needs.