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CBSE class 9 Mathematics Chapter 8 Quadrilaterals notes in PDF are available for free download in myCBSEguide mobile app. The best app for CBSE students now provides Quadrilaterals class 9 Notes latest chapter wise notes for quick preparation of CBSE exams and school based annual examinations. Class 9 Mathematics notes on Chapter 8 Quadrilaterals are also available for download in CBSE Guide website.

CBSE Guide Quadrilaterals class 9 Notes

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9 Mathematics notes Chapter 8 Quadrilaterals

Download CBSE class 9th revision notes for Chapter 8 Quadrilaterals in PDF format for free. Download revision notes for Quadrilaterals class 9 Notes and score high in exams. These are the Quadrilaterals class 9 Notes prepared by team of expert teachers. The revision notes help you revise the whole chapter in minutes. Revising notes in exam days is on of the best tips recommended by teachers during exam days.

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CBSE Class 09 Mathematics
Revision Notes
CHAPTER 8
QUADRILATERALS

Angle Sum Property of a Quadrilaterals
Types of Quadrilaterals
Properties of a Parallelogram
The Mid-point Theorem

Sum of the all angles of a quadrilateral is ${360^o}$
A diagonals of a parallelogram divides it into two congruent triangles.
In a parallelogram

diagonals bisects each other.
opposite angles are equal.
opposite sides are equal

(4) Diagonals of a square bisects each other at right angles and are equal, and vice-versa.
(5) A line through the mid-point of a side of a triangle parallel to another side bisects the third side. (Mid point theorem)
(6)The line segment joining the mid-points of two sides of a triangle is parallel to the third side and equal to half the third side.
(7) In a parallelogram, the bisectors of any two consecutive angles intersect at right angle.
(8) If a diagonal of a parallelogram bisect one of the angles of a parallelogram it also bisects the second angle.
(9) The angle bisectors of a parallelogram form a rectangle.
(10) Each of the four angles of a rectangle is right angle.
(11) The diagonals of a rhombus are perpendicular to each other.

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CBSE Class-9 Revision Notes and Key Points

Quadrilaterals class 9 Notes. CBSE quick revision note for Class-9 Mathematics, Chemistry, Maths, Biology and other subject are very helpful to revise the whole syllabus during exam days. The revision notes covers all important formulas and concepts given in the chapter. Even if you wish to have an overview of a chapter, quick revision notes are here to do if for you. These notes will certainly save your time during stressful exam days.

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