Basic HTML Version

|  | Table of Contents |  | View Full Version

Page 111 - 2611_SmartGPT Pro V(5.0) C-4
P. 111

    uiz   Bee        Which block erases everything drawn by the pen?
                                              ___________________________________________________________

                               DRAWING SHAPES USING CONTROL BLOCKS

                     The shapes can also be drawn using different Control blocks.

                     REPEAT BLOCK

                     If you want to repeat a block of code a fixed number of times, the Repeat block is used.
                     With the Repeat block, you can draw Polygons. Examples of polygons are triangle, square,
                     pentagon, hexagon, heptagon, octagon, nonagon, decagon, etc.

                     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.

                                                                                                     Blocks in Scratch  109

| 106 107 108 109 110 111 112 113 114 115 116 |