Arc Plot

## Description

Sage can plot part of the outside of a circle or ellipse as an arc. This is done using the `arc()` command, which takes the following parameters:

`center`: An ordered pair defining the center of the circle or ellipse.`r1`: The radius of the first axis of the circle or ellipse. If`r2`is not set, it is assumed to be equal to`r1`and a circle is drawn.`r2`: The radius of the second axis of the ellipse. Only set this if drawing an ellipse.`angle`: The angle in radians between the first axis and the x-axis. Defaults to 0.`sector`: A tuple determining the portion of the circle or ellipse to draw. Defaults to (0, 2*pi)

## Sage Cell

#### Code

```
# Arc of a circle from pi/4 to 3*pi/4 radians.
a1 = arc(center=(0,0), r1=1, sector=(pi/4,3*pi/4))
# Arc of an ellipse from 5*pi/4 to 7*pi/4 radians. Colored red.
a2 = arc(center=(0,0), r1 = 2, r2 = 1, sector=(5*pi/4, 7*pi/4), color='red')
(a1 + a2).show()
```

## Options

none

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Date: 21 Jul 2019 21:19

Submitted by: Zane Corbiere