Quadrilaterals
Class 9 · Mathematics · 5 lessons
This chapter, Quadrilaterals, is part of the Class 9 Mathematics syllabus under CBSE, Telangana and Andhra Pradesh boards. It contains 5 lessons — starting with Introduction to Quadrilaterals, Exercise 8.1 — Quadrilateral Properties, Exercise 8.2 — Parallelograms, and more — each with free, step-by-step PDF notes you can study directly in the browser or present in class in fullscreen mode. Work through the lessons in order below; later exercises in this chapter generally build on the concepts introduced in the earlier ones.
Introduction to Quadrilaterals
Types and properties of quadrilaterals.
Exercise 8.1 — Quadrilateral Properties
Problems based on properties of quadrilaterals.
Exercise 8.2 — Parallelograms
Parallelograms and their properties.
Exercise 8.3 — Diagonals of Parallelogram
Properties of diagonals of a parallelogram.
Exercise 8.4 — Mid Point Theorem
The mid point theorem of a triangle.