Best Selling 0~360 Degree Universal Digital Bevel Protractor with Blades

It should be noted that the protractor is divided into the outer circle and the inner circle. When the zero scale line is in the inner circle, the degree of the inner circle should be read. When the outer circle, the degree of the outer circle can be read. The protractor can not only measure the angle, but also draw any angle. Straight lines, parallel lines, straight lines and parallel lines are not mentioned. The ruler can also be completed. Let's talk about how to use the protractor to draw an angle of a specified angle, This is a function that the ruler does not have (except for special angles).

When measuring the angle, first put the protractor on the top of the angle, then find the vertex of the angle, make the center of the protractor coincide with the vertex of the angle, and then make the side of the angle coincide with the zero scale line. After completing the two coincidences, we can measure the degree of the angle. Find the other side of the angle and see which scale of the protractor the other side of the angle falls on. At this time, the angle degree is how much.