set the style of graphic "All Angles" to regular
choose regular polygon tool
Regular polygons are geometric shapes whose sides are all the same length, such as squares, equilateral triangles, hexagons, and so on. (You set the number of sides with the polySides property.)
When using the Regular tool, the cursor is a crosshairs shape (over stack windows) or an arrow (anywhere else). This tool is used to draw a polygon in the penColor, filled with the brushColor (or brushPattern). The number of sides is determined by the global polySides property.
If you try to paint with the Regular tool on a card that has no images, an image the size of the card is created to hold the painting. If the current card already has one or more images, painting outside the image has no effect.
Setting the style of a graphic to "regular" makes the graphic into a regular polygon. Regular polygon graphics, unlike painted polygons, can be changed and reshaped: use the polySides properties to change the shape.