Page 72 - Computer Genius Class 05
P. 72
The line appears on the stage.
To view the line in full screen, click on Full Screen Control button on the top right
corner of the stage.
Notes
To come out of the Full Screen Control mode, Click on the Full
Screen Control button or press Esc key
Drawing Polygons in Scratch
Polygons are 2D shapes with three or more straight lines and angles. Examples of polygons
are triangle, square, rectangle, quadrilateral, pentagon, octagon, etc.
Equilateral Square Pentagon Hexagon
Triangle sides sides sides sides
Heptagon Octagon Nonagon Decagon
sides sides sides 1 sides
To draw polygons in Scratch, you must remember a few thumb rules. These are as follows:
You must know the number of sides in the shape. This is the value to be given in repeat
loc . For example you gi e repeat to dra a triangle and to dra a s uare.
Each time a repeat command is used, you draw a line and turn at a corner.
You must know the degree of the angle at the corner. It is very easy to calculate this. Just
di ide y the num er o sides in the shape. For example to dra a triangle the turn
ill e sides o the triangle 12 .
Look at these polygons that can be made using repeat.
Polygon Command
Triangle Repeat 3 o e 1 teps Turn 12 degrees
Square epeat o e 1 teps Turn degrees
70 Computer Genius-V

