How to draw an arc

Method 1: First, draw the radii of the starting point and the ending point of the arc. Just click the starting point and the ending point at will and enter the exact radius. Then len, enter, enter all, enter the arc length you want, and then choose the arc you draw.

Method 2: First make a circle or arc with a known radius, then use the length command, select T, enter the length, and then select the segment to be cut on the arc segment, leaving an arc with a fixed length.

Method 3: Calculate the angle, and then draw an arc center, starting point and length (angle).

Arc is a Chinese word, and the pinyin is yuán hú. The part between any two points on a circle is called an arc. Maths is taught in junior high school and senior high school. Two endpoints of any diameter of a circle divide the circle into two arcs. Those larger than a semicircle are called optimal arcs, and those smaller than a semicircle are called suboptimal arcs.

The part between any two points on a circle is called an arc. An arc is represented by the symbol ⌒. For example, arcs with endpoints A and B are pronounced as arcs AB or AB. An arc larger than a semicircle is called an upper arc, and an arc smaller than a semicircle is called a lower arc. The degree of arc refers to the degree of the central angle of the arc.

A semicircle is also an arc, and a straight line connecting two points AB is a chord AB. A semicircle is neither a bad arc nor a good arc, and it is a boundary to distinguish a bad arc from a good arc.

Circle can be said to be a very common figure in geometric figures. Many curve problems can be derived from the circle, and the arc is the simplest one. You can easily make a circle by using the geometric sketchpad tool, and you can also use the geometric sketchpad to construct an arc on the circle, that is, to construct an arc.

In the construction and installation site, we often encounter circular linear shapes, such as circular structures or decorations in highways, railways, water conservancy, electric power, building construction, municipal landscape engineering, etc. Where there is construction, almost circular alignment is needed. It can be said that how to realize accurate circular arc fixed-point lofting is a problem that every field technician must face.

By analogy, three kinds of five common arc lofting methods are summarized. Among them, it is the first time to systematically summarize and put forward two kinds of straightedge methods for arc lofting in workplace. Its advantages are intuitive, simple and easy to operate. Construction workers with junior high school mathematics knowledge can check and recover their shortcomings at any time with the simplest ruler, which is worth popularizing and applying.