Page 54 - PlusGPT_V2.1_C1_Flipbook
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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
52 Premium Edition-VI

