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The area of a triangle with three collinear points is:

ATwoo
BNine
CZero
DOnee
Answer & Solution
Correct answer: C. Zero
1. Collinear points all lie on one straight line. 2. No triangle is enclosed between them. 3. So the area works out to zero. 4. The answer is zero. _Source: syllabus Mathematics, Ch 4 'Determinants'_
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