Collinear
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Definition of Collinear
Three or more points that lie on the same straight line are called to be Collinear.
More about Collinear

Three points (x_{i} , y_{i} , z_{i}), where i = 1, 2, 3, are collinear if x_{2}  x_{1} : y_{2}  y_{1} : z_{2}  z_{1} = x_{3}  x_{1} : y_{3}  y_{1} : z_{3} z_{1}.
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Example of Collinear
Solved Example onCollinear
Ques: Determine the points that are collinear in the following diagram.
Choices:

A. A, B, F
B. A, B, C, D
C. A, B, C, D, E, F, G
D. E, F, G
Correct Answer: B
Solution:

Step 1: Three or more points that lie on the same straight line are called collinear.
Step 2: In the above diagram, points A, B, C, D lie on the same straight line.
Step 3: So, the points A, B, C, D are collinear.
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