Page 106 - trackpad v5.1 class 4 flipbook
P. 106
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 With and Without Using Repeat Block
Create the given Script and observe the sprite moving and turning only four times to draw
a square using repeat block. Click four times on the when clicked block to draw a square
without using repeat block.
when clicked when clicked
pen down pen down
repeat 4 set pen color to
move 100 steps set to pen size 5
turn 90 degrees move 50 steps
turn 90 degrees
Drawing A Circle
To draw a circle, create the given script in Scratch.
104 Pro (V5.1)-IV

