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
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