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Straight Lines — Maths STD 11 Science — Question

CBSE BoardEnglish MediumSTD 11 ScienceMathsStraight Lines1 Mark
Question
State whether the statements:
The points A (-2, 1), B (0, 5), C (-1, 2) are collinear.
✓

Answer

False.Solution:
Given points are A(-2, 1), B(0, 5) and C(-1, 2) are collinear.
Slope of $\text{AB}=\frac{5-1}{0+2}=2$
Slope of $\text{BC}=\frac{2-5}{-1-0}=3$
Since the slopes are different, A, b and C are not collinear.

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