The following Topics and Sub-Topics are covered in this chapter and are available on MSVgo:
Lines and angles are the most fundamental and pertinent geometrical concepts. Without these basic structures, it is impossible to understand intricate geometrical shapes any further. Let us take a closer look at what lines and angles are.
What comes to your mind when you think of a line? Is just joining two points anyhow a line? The answer is no; a line is a straight but one-dimensional figure which can extend in both the directions. A line is the most commonly used geometrical shape. A line has length but no width or thickness. Lines make shapes.
A ray is a combination of a line and a line segment. It has one starting point, and it can extend in only one direction. So, it is not completely like a line segment nor completely like a line either.
Two or more lines form a pair of lines. But, there are some important concepts to learn with a pair of lines.
Angles are a very important part of geometry. Pairs of angles which are related to each other in some or other way are called related angles and related angles have given some names which you will see below.
To check for parallel lines, you have to test these parameters:
Lines and angles are a very important and fundamental part of geometry and we have learnt the most important and most basic things of geometry, so we will use the concepts of lines and angles of geometry furthermore.