The arc is a Chinese character, and the pinyin is yuán? Hú, the part between any two points on the circle is called arc, or arc for short. 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. [ 1]?

An arc is represented by the symbol ⌒.

Circular arc 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. [2]?

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.

Arc length of arc:

(R= radius, n= absolute value of arc angle)

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. We can easily make a circle with the geometric sketchpad tool, or we can construct an arc on the circle with the geometric sketchpad, that is, construct an arc.

I hope it can help you solve the problem.