First Forward Into Logo 2: Polygons
This is the second in a twelve part introduction to Logo for beginners. In this part you learn to draw polygons.
Age
7 to 16
Challenge level
First Forward Into Logo
Previous: FF1
This article focuses on drawing regular polygons; equilateral triangles, squares, pentagons, hexagons etc. It's very easy. Here is a reminder of some of the PRIMITIVES (the commands) needed to start drawing:
FD forward
BK backward
LT left
RT right
PU pen up
PD pen down
HT hide turtle
ST show turtle
CS clear screen
CT clear text
Here is an example of the use of REPEAT. Try it!
REPEAT 5 [FD 30 RT 72]
Now try REPEAT 3 and REPEAT 4 etc and vary the distances and the angles.
Away you go!
Next: FF3
To draw a regular polygon you will need to work out the exterior angle, but that is simple because to end up facing the same way as at the start you must turn a total of 360 degrees.
Programs used in this series were written using MSWLogo and you can download this excellent free software from the internet at http://www.softronix.com/logo.html . This series complements the LOGO Challenges that can also be found on the site.