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If three points give an area of zero, what does that show?

AThey form a circle
BThey form a cube
CThey are collinear
DThey form a square
Answer & Solution
Correct answer: C. They are collinear
1. No triangle has been enclosed. 2. The three must lie on one line. 3. They are collinear. _Source: syllabus Mathematics, Chapter 7, Coordinate Geometry._
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