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Look at these polygons that can be made using the repeat block.

Polygon Command

Triangle Repeat 3 Move 100 Steps Turn 120 degrees

Square Repeat 4 Move 100 Steps Turn 90 degrees

Pentagon Repeat 5 Move 100 Steps Turn 72 degrees

Hexagon Repeat 6 Move 100 Steps Turn 60 degrees

Heptagon Repeat 7 Move 100 Steps Turn 51 degrees

Octagon Repeat 8 Move 100 Steps Turn 45 degrees

Nonagon Repeat 9 Move 100 Steps Turn 40 degrees

Decagon Repeat 10 Move 100 Steps Turn 36 degrees

To draw polygons in Scratch, you must remember three points:
1. You must know the number of sides in the shape. This is the value to be given in repeat block.
2. Each time a repeat command is used, you draw a line and turn at a corner.
3. You must know the degree of the angle at the corner. It is very easy to calculate this. Just divide
360 by the number of sides in the shape.

Drawing A Square

Create the given Script and observe the sprite moving and turning only four times to draw a square.

when clicked
pen down
repeat 4
move 100 steps
turn 90 degrees

Drawing A Circle

To draw a circle, create the given script in Scratch.

when clicked
pen down
set to pen size 5
repeat 360
move 1 steps
turn 1 degrees
Change pen color by 5

Scratch Programming 59