# Difference between revisions of "Sector Command" Jump to: navigation, search

##### Sector

This article is about GeoGebra command.

##### Command Categories (All commands)

Sector[ <Conic>, <Point>, <Point> ]
Yields a conic sector between two points on the conic section.
Example:
• 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.
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.
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