# Difference between revisions of "Sector Command" ##### Command Categories (All commands)

Sector( <Conic>, <Point>, <Point> )
Yields a conic sector between two points on the conic section and calculates its area.
Examples:
• Let `c: x^2 + 2y^2 = 8` be an ellipse, `D = (-2.83, 0)` and `E = (0, -2)` two points on the ellipse. `Sector(c, D, E)` yields d = 4.44.
• Let `c: x^2 + y^2 = 9` be a circle, `A = (3, 0)` and `B = (0, 3)` two points on the circle. `Sector(c, A, B)` yields d = 7.07
Note: This works only for a circle or ellipse.

Sector( <Conic>, <Parameter Value>, <Parameter Value> )
Yields a conic sector between two parameter values between 0 and on the conic section and calculates its area.
Example: Let `c: x^2 + y^2 = 9` be a circle. `Sector(c, 0, 3/4 π)` yields d = 10.6
Note: Internally the following parametric forms are used:
• Circle: (r cos(t), r sin(t)) where r is the circle's radius.
• Ellipse: (a cos(t), b sin(t)) where a and b are the lengths of the semimajor and semiminor axes.
• GeoGebra
• Help
• Partners