# Straight Lines Class 11 Formulas & Notes

**Class 11 Math Chapter 10 Straight Lines Formulas & Notes - PDF Download**

Straight Lines Class 11 Formulas & Notes are cumulated by our panel of highly experienced teachers to provide the students with effective exam preparation. The pdf not only includes the list of formulae but also offer students with the summary of the chapter, important points to remember and detailed explanation of important concepts and derivations for better understanding and retaining of the chapter. Going through these Straight Lines Class 11 Formulas & Notes would easily help students to grasp challenging concepts which would ultimately lead them to score maximum marks in their exams.

**How do you define Straight Lines?**

Straight line represents straights objects with negligible width and depth. The angle (say) θ made by the line l with positive direction of x-axis and measured anti clockwise is called inclination of the line. Obviously 0° ≤ θ ≤ 180° If θ is the inclination of a line l, then tan θ is called the slope or gradient of the line l. We know that graph of general equation of first degree in two variables, Ax + By + C = 0, where A, B and C are real constants such that A and B are not zero simultaneously is a straight line. Thus, General Equation of Straight line is Ax + By + C = 0, where A, B and C are real constants such that A and B are not zero simultaneously.

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