Inclination of a Line
The inclination of a line is the angle θ which the part of the line (above the x-axis) makes with x-axis.
If measured in anti-clockwise direction then the inclination θ is positive and if measured in clockwise direction then the inclination θ is negative.
The inclination of a line or the angle of inclination of the line is the angle which a straight line makes with the positive direction of x-axis measured in the anti-clockwise direction to the part of the line above the x-axis. The inclination is usually denoted by θ.
Notes:
(i) The inclination of x-axis and every line parallel to x-axis is 0°
i.e. the inclination of a line parallel to x-axis or the x-axis itself is 0°.
(i) The inclination of y-axis and every line parallel to y-axis is 90°
i.e. the inclination of a line parallel to y-axis or the y-axis itself is 90°.
● Equation of a Straight Line
- Inclination of a Line
- Slope of a Line
- Intercepts Made by a Straight Line on Axes
- Slope of the Line Joining Two Points
- Equation of a Straight Line
- Point-slope Form of a Line
- Two-point Form of a Line
- Equally Inclined Lines
- Slope and Y-intercept of a Line
- Condition of Perpendicularity of Two Straight Lines
- Condition of parallelism
- Problems on Condition of Perpendicularity
- Worksheet on Slope and Intercepts
- Worksheet on Slope Intercept Form
- Worksheet on Two-point Form
- Worksheet on Point-slope Form
- Worksheet on Collinearity of 3 Points
- Worksheet on Equation of a Straight Line
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