In geometry, the notion of line or straight line was introduced by ancient mathematicians to represent straight objects with negligible width and depth. Lines are an idealization of such objects, which are often described in terms of two points or referred to using a single letter.
<h3>Types of Lines:</h3>
Vertical lines: are straight up and down and perpendicular to horizontal lines.
Horizontal lines: are straight up and down and perpendicular to vertical lines.
Diagonal lines: are lines that straight in any direction except vertical or horizontal.
The equation of a line is typically written as y=mx+b where m is the slope and b is the y-intercept. If you know two points that a line passes through, this page will show you how to find the equation of the line.
