TTS Pro-Bot Teachers Manual page 8

Activity
After spending time experimenting with Pro-Bot and getting it to draw
simple regular polygons, pupils can begin to look at ways to become
more efficient in their programming.
Pro-Bot has a Repeat command. This can be used to repeat one or several
commands. In the previous activity children might have used commands
like these below to draw a square:
Ask the children to look carefully at the commands. Can they see which
instructions repeat and how many times they repeat?
The commands fd 10 and rt 90 are repeated four times. To draw the
same square that is shown as the example bottom right enter:
This is an ideal point to use a pen in Pro-Bot's pen holder and see the
shape that's drawn. What other regular polygons can the children
create?
They should try drawing an equilateral triangle with Pro-Bot . This is
often found to be challenging and can lead to some good discussions
about internal and external angles. Another good discussion point can be
around the relationship between the number of sides and the angle e.g.
A square is 4 sides, external angle 90°
A pentagon is 5 sides, external angle 72°
An octagon is 8 sides, external angle 45°
Tip: For each of the above multiply the number of sides by the angle.
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8
Main
Fd 10
Rt 90
Fd 10
Rt 90
Fd 10
Rt 90
Fd 10
Rt 90
Main
Rpt 4 [
Fd 10
Rt 90
]