Question

Объясните что такое луч . Как обозначаются лучи ?

Answer 1

Луч это фигура которая имеет начало но не имеет конца, чаще всего обозначают малой латинской буквой l

Answer 2

What is a Ray and How are Rays Denoted?

A ray is a part of a line that starts at a particular point and extends infinitely in one direction. Rays are denoted using an initial point and another point on the ray, with an arrow symbol over the two points to indicate the direction of the ray's extension.

For example, if the initial point is A and another point on the ray is B, the ray would be denoted as AB with an arrow symbol over the AB to indicate the direction in which the ray extends.

In mathematical terms, a ray can be represented as a single lowercase letter, such as "r", with a line segment symbol over it to indicate that it is a ray.