## Collinear

### In mathematics, collinear refers to a set of points that lie on the same straight line

In mathematics, collinear refers to a set of points that lie on the same straight line. In other words, if three or more points are considered collinear, it means that there exists a line on which all of these points lie.

To determine if points are collinear, you can use the concept of slope. Given three points A, B, and C, you can find the slopes of the line segments AB and BC. If the slopes of these line segments are equal, then the three points are collinear. This is known as the slope criterion for collinearity.

Another method to check for collinearity is to use the concept of area. If the area of the triangle formed by the three points A, B, and C is zero, then the points are collinear. This is known as the area criterion for collinearity.

Collinearity is an important concept in geometry and it has various applications in different branches of mathematics and science. For example, in geometric proofs, knowing that certain points are collinear can be crucial in establishing the validity of the statement. Additionally, collinearity is often used in computer graphics and image processing algorithms to manipulate and analyze shapes and lines.

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