The contents of straight lines class 11 NCERT solutions are structured as follows:

10.1 Introduction

10.2 Slope of a Line

• 10.2.1 Calculation of slope when coordinates of any two points on the line are given
• 10.2.2 Criteria for parallelism and perpendicularity of lines based on their slopes
• 10.2.3 Calculation of angle between two lines
• 10.2.4 Determination of collinearity of three points

10.3 Various Forms of the Equation of a Line

• 10.3.1 Discussion of horizontal and vertical lines
• 10.3.2 Derivation of point-slope form
• 10.3.3 Derivation of two-point form
• 10.3.4 Derivation of slope-intercept form
• 10.3.5 Derivation of intercept-form
• 10.3.6 Derivation of normal form

10.4 General Equation of a Line

• 10.4.1 Explanation of different forms of Ax + By + C = 0

10.5 Distance of a Point From a Line

• 10.5.1 Computation of distance between two parallel lines.