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MCQ
If the slope of a line is negative, its angle of inclination is:
Unit-8 Geometry of Straight Lines
A between 0 degrees and 90 degrees
B between 90 degrees and 180 degrees
C 0 degrees
D 90 degrees
Explanation

A negative slope means tan θ < 0, so the inclination lies between 90 degrees and 180 degrees.

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