If you need to draw the correct five-pointed star, then you can use simple tools - a protractor and a ruler. It is more difficult to represent a star in the absence of a protractor. Here you will be come to the rescue by usual compasses. Arm with it, take the sheet of paper and start performance of a task.
It is required to you
- Sheet of paper, compasses, ruler, pencil
Instruction
1. By means of compasses draw on the sheet of paper a circle of the necessary diameter with the center in O point. Creation correctfive-pointedof stars represents the task similar to description in a circleof correct pentagon.
2. Carry out diameter of AV through a circle, having arranged it it is horizontal.
3. Restore CD perpendicular to direct AV in a point of the Lake. For this purpose carry out circles with the centers in points And yes In with identical radiuses, and then draw a straight line through points of intersection of these circles.
4. Similarly halve a piece of the joint-stock company a point E. For division of a piece carry out circles of identical radius with the centers in points And yes O. Teper connect points of intersection of circles the line - it will halve a piece of the joint-stock company precisely.
5. Carry out from a point E circle by the radius of SE and find a point F crossings with AV piece. The piece of CF is the required piece equal to the party of the entered pentagon.
6. From the point With located in the top part of a circle put consistently on all circle of a mark so that they settled down at distance from each other, equal CF. The circle will be divided into five equal parts. Exact division is possible only at accurate construction by means of good compasses.
7. Connect five points which turned out on a circle so that the five-pointed star turned out. For this purpose you need a ruler.
8. If necessary erase auxiliary lines in a circle an eraser that they did not spoil a type of a star. It is also possible to remove all other strokes used at creation of a figure.