NCERT Solutions for Class 9 Maths Chapter 8 Quadrilaterals **Exercise 8.1** and **Exercise 8.2** – चतुर्भुज की **प्रश्नावली 8.1** and **प्रश्नावली 8.2** in free PDF download in * Hindi Medium* and

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## NCERT Solutions for Class 9 Maths Chapter 8

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### Class 9 Maths Chapter 8 Quadrilaterals Solutions

#### Hindi Medium & English Medium Solutions

- Class 9 Maths Chapter 8 Exercise 8.1 Solutions
- Class 9 Maths Chapter 8 Exercise 8.2 Solutions
**NCERT Books for Class 9 All Subjects****NCERT Exemplar Problems Solutions****Study Material for 2018-2019 – English Medium****Study Material for 2018-2019 – Hindi Medium**

#### Class 9 Maths Chapter 8 Exercise 8.1 Solutions in English

NCERT Solutions for Class 9 Maths Chapter 8 Exercise 8.1 sols in English medium for CBSE, UP Board, Uttarakhand, Bihar and Gujrat board, wherever the **NCERT Books** are prescribed as a course book. See here **Exercise 8.2** and * Hindi Medium* for the students using books in Hindi.

##### Class 9 Maths Chapter 8 Exercise 8.2 Solutions in English

9 Maths Exercise 8.2 Solutions in English medium free to use for all the students as well as teachers. Move to **Exercise 8.1** or to in * Hindi Medium* as per your need.

#### 9 Maths Chapter 8 Exercise 8.1 Solutions in Hindi

9 Maths Exercise 8.1 Solutions in Hindi Medium free to download or use it ONLINE. Click here if you want to study **प्रश्नावली 8.2** or go for * English Medium* if you want to change the medium.

##### 9 Maths Chapter 8 Exercise 8.2 Solutions in Hindi

NCERT Books Solutions for Class 9 Ganit PRASHNAVALI 8.2 in Hindi free to use offline as well as online. Visit here for चतुर्भुज की **प्रश्नावली 8.1** and for solutions in English click here **English Medium.**

##### Important Theorems and Rules on Quadrilaterals

- Sum of the all angles of a quadrilateral is 360.
- A quadrilateral in which one pair of opposite sides are parallel, is called trapezium.
- A quadrilateral in which both pairs of opposite sides are parallel, is called parallelogram.
- A parallelogram in which one of its angle is right angle, is called a rectangle.
- A parallelogram in which all side are equal, is called rhombus.
- A rectangle with all sides equal, is a square.
- Diagonals of parallelogram divides it into two congruent triangles.
- In a parallelogram
- Opposite sides are equal
- Opposite angles are equal
- Diagonals bisect each other.

- The diagonals of following quadrilateral bisect each other:
- Parallelogram
- Rectangle
- Square
- Rhombus

- The line segment joining the mid-points of two sides of a triangle is parallel to the third side and is half of it.
- A line drawn through the mid-point of a side of a triangle parallel to another side bisects the third side.

The quadrilateral formed by joining the mid-points of the sides of a quadrilateral, taken in order, is a parallelogram.