First you need to prepare tools: pen, paper, compass, protractor and ruler.

Operating steps:

1, use a pen to select a midpoint on the paper with a circle as the center, and then use a compass to draw a circle on the paper (the size of the circle should be determined as needed);

2. Draw a straight line through the center of the circle, just like drawing the diameter of a circle;

3. Divide the whole circle into five equal parts with the center of the circle and the straight line just drawn as the starting point and 72 as the standard;

4. Connect the points where the radius intersects with the circular edge, with one point between every two points;

5, the five-pointed star is completed.

References:

Fiddler is the oldest metalworking technology in machinery manufacturing. Because it is often used to clamp the workpiece on the workbench, it was named after19th century. With the development and popularization of various machine tools, locksmith is still the basic technology widely used in machinery manufacturing, although most of the locksmith operations have been gradually mechanized and automated. The fitter's operations mainly include chiseling, filing, sawing, marking, drilling, reaming, tapping and tapping (see thread processing), scraping, grinding, correcting, bending and riveting. Fiddler has three advantages (flexible machining, complex shape, high precision parts and low investment) and two disadvantages (low production efficiency, high labor intensity and unstable machining quality).