The angle a line makes with the positive x-axis, measured anticlockwise, is its:
AInclination
BInclusion
CIncision
DInfusion
Answer & Solution
Correct answer: A. Inclination
1. A line is fixed in direction by the angle it makes with a reference.
2. That reference is the positive direction of the x-axis.
3. The angle measured anticlockwise from it is called the inclination.
4. It runs from zero up to one hundred and eighty degrees.
_Source: NCERT Class XI Mathematics, Ch 9 'Straight Lines'_
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