# AddPointPoly: Adds a point to a previously defined polygon In LearnGeom: Learning Plane Geometry

## Description

`AddPointPoly` creates a matrix to represent the polygon that connects several points

## Usage

 `1` ```AddPointPoly(Poly, point, position) ```

## Arguments

 `Poly` Polygon object, previously created with function `CreatePolygon` or `CreateRegularPolygon` `point` Vector containing the xy-coordinates of the point to be added to the polygon `position` Integer indicating the position of the point in the original polygon, after which the new point is being added (considering that every polygon is an ordered list of points). It is convenient to visualize the polygon with `label = T` in order to avoid mistakes

## Value

Returns a matrix which contains the points of the polygon. Each row represents one of the points

## Examples

 ``` 1 2 3 4 5 6 7 8 9 10 11``` ```x_min <- -5 x_max <- 5 y_min <- -5 y_max <- 5 CoordinatePlane(x_min, x_max, y_min, y_max) n <- 5 C <- c(0,0) l <- 2 Penta <- CreateRegularPolygon(n, C, l) Penta <- AddPointPoly(Penta, CenterPolygon(Penta), 1) Draw(Penta, "blue", label = TRUE) ```

### Example output

```NULL
NULL
```

LearnGeom documentation built on July 14, 2020, 5:06 p.m.