Chapter 8 of 12
Revision Notes
Quadrilaterals — Revision Notes
Gujarat Board · Class 9 · Mathematics
Quadrilaterals revision notes for Gujarat Board Class 9 Mathematics: 4 topics in quick points. Part of the Gujarat Board Class 9 Mathematics syllabus.
45 questions22 flashcards5 concepts
Interactive on Super Tutor
Studying Quadrilaterals? Get the full interactive chapter.
Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for revision notes and more.
Free trial, no card needed.
Key Topics to Revise
1
Properties of Parallelograms
- A parallelogram is a quadrilateral where both pairs of opposite sides are parallel
- A diagonal of a parallelogram divides it into two congruent triangles
- In a parallelogram, opposite sides are equal (AB = DC and AD = BC)
2
Special Parallelograms
- Rectangle: A parallelogram with one right angle (all angles become 90°)
- Rhombus: A parallelogram with all sides equal
- Square: A parallelogram with all sides equal and all angles 90°
3
Converse Theorems and Conditions
- If both pairs of opposite sides are equal, then it's a parallelogram
- If both pairs of opposite angles are equal, then it's a parallelogram
- If diagonals bisect each other, then it's a parallelogram
4
Mid-point Theorem
- The line segment joining mid-points of two sides of a triangle is parallel to the third side
- This line segment is half the length of the third side
- Converse: A line through mid-point of one side, parallel to another side, bisects the third side
Get complete notes with diagrams and examples
Full NotesKey Concepts
A parallelogram has opposite sides parallelA rectangle is a parallelogramA rhombus is a parallelogramA square combines properties of bothThe line segment joining mid
Frequently Asked Questions
What are the important topics in Quadrilaterals for Gujarat Board Class 9 Mathematics?
Key topics in Quadrilaterals include Properties of Parallelograms, Special Parallelograms, Converse Theorems and Conditions, Mid-point Theorem. Study these first, then practise questions on each for Class 9 exams.
How should I revise Quadrilaterals for Class 9 exams?
Learn the core ideas first, then work through the 45 practice questions on Quadrilaterals. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
More resources for Quadrilaterals
For serious students
Get the full Quadrilaterals chapter — start free.
Quizzes, flashcards, an AI doubt solver and a study plan for Gujarat Board Class 9 Mathematics. Free to start, no card needed.