Page 75 - Digicode_AI_class_5
P. 75

To view the line in full screen, click on Full Screen Control button               on the top right
            corner of the stage.





                              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 (3 sides)     (4 sides)          (5 sides)          (6 sides)








                             Heptagon            Octagon            Nonagon            Decagon
                              (7 sides)          (8 sides)          (9 sides)         (10 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
               block. For example, you give repeat 3 to draw a triangle and 4 to draw a square.

                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
               divide 360 by the number of sides in the shape. For example, to draw a triangle, the turn
               will be 360/3 (sides of the triangle) = 120.
            Look at these polygons that can be made using repeat.



                                 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



                                                                             Creating Shapes  in Scratch  73
   70   71   72   73   74   75   76   77   78   79   80