**Guide Section: Diagramming**

**EASAP Tree:** **USER INTERFACE** → **DIAGRAM LIST** → **DIAGRAM**

**SECTOR** draws a sector of a circle ('pie slice') or an annular ring.

**SECTOR**is defined by the parameters below:- An origin point about which the sector is rotated,
- The inner and outer radii of the sector,
- The starting and ending angles of the sector.

To specify a **SECTOR** of a circle, set the inner radius to zero.

To specify an arc of a circle by setting the inner and outer radii to the same value.

An angle value of zero is from the origin out along the positive x-axis (horizontal); angle values increase in a counter-clockwise direction.

The **Angles:** parameter accepts inline units of **deg** after the angle values to change from the the default units of radians.

SECTOR | |
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Essential Parameters: | |

Origin: | Point coordinates at the center of sector rotation: x0,y0 |

Radii: | Inner and outer radii of sector: Ri, Ro |

Angles: | Starting and ending angles in radians: a1,a2. The zero angle is aligned horizontally from the origin out along the positive X-axis; angle values then increase in a counter-clockwise direction. |

Optional Parameters: | |

Show if: | Logical expression, if FALSE then shape NOT shown else default→TRUE |

Fill Style: | Select FILL STYLE from list. (default→Black, Opaque) |

Line Style: | Select LINE STYLE from list. default→Transparent |

Transform: | Select one or more TRANSFORM from list. Order selected is order applied. |