- Parallelogram: A quadrilateral with each pair of opposite sides parallel.
(1) Opposite sides are equal.
(2) Opposite angles are equal.
(3) Diagonals bisect one another. 
- Rhombus: A parallelogram with sides of equal length.
(1) All the properties of a parallelogram.
(2) Diagonals are perpendicular to each other.
- Rectangle: A parallelogram with a right angle.
(1) All the properties of a parallelogram.
(2) Each of the angles is a right angle.
(3) Diagonals are equal. -
- Square: A rectangle with sides of equal length.
(1) All the properties of a parallelogram, rhombus and a rectangle.
- Kite: A quadrilateral with exactly two pairs of equal consecutive sides
(1) The diagonals are perpendicular to one another
(2) One of the diagonals bisects the other.
(3) In the figure
but 
.
- Trapezium: A quadrilateral having exactly one pair of parallel sides.
- Diagonal: A simple closed curve made up of only line segments. A line segment connecting two non-consecutive vertices of a polygon is called diagonal.
- Convex : The measure of each angle is less than
. - Concave: The measure of at least one angle is more than
- Quadrilateral: Polygon having four sides.
- Element of quadrilateral:
(i) Sides: Line segments joining the points.
(ii) Vertices: Point of intersection of two consecutive sides.
(iii) Opposite sides: Two sides of a quadrilateral having no common end point.
(iv) Opposite Angles: Two angles of a quadrilateral not having a common arm.
(v) Diagonals: Line segment obtained by joining the opposite vertices.
(vi) Adjacent Angles: Two angles of a quadrilateral having a common arm.
(vii) Adjacent Sides: Two sides of a quadrilateral having a common end point.
For More:-
CBSE Class–VII |
CHAPTER – 1 Integers | NMMS Revision Notes à
Click
Here
Tracing Changes Through a Thousand Years | NMMS Revision
Notes | Class 7 | Social à Click
Here
New Kings and Kingdoms | NMMS Revision Notes | Class 7 |
Social à Click Here
The Delhi Sultanate | NMMS Revision Notes | Class 7
Social à Click
Here
The Mughal Empire | NMMS Revision Notes | Class 7 Social à Click Here
Tribes Nomads and Settled Communities | NMMS Revision
Notes | Class 7 Social à
Click
Here
Devotional Paths to the Divine | NMMS Revision Notes |
Class 7 Social à
Click
Here
The Making of Regional Cultures | NMMS Revision Notes |
Class 7 Social à
Click
Here
Eighteenth Century Political Formations | NMMS Revision
Notes | Class 7 Social à
Click
Here
Environment | NMMS Revision Notes | Class 7 Social à Click
Here
Inside Our Earth | NMMS Revision Notes | Class 7 Social à Click Here
Our Changing Earth | NMMS Revision Notes | Class 7 Social
à Click Here
Air | NMMS Revision Notes | Class 7 Social à
Click Here
Water | NMMS Revision Notes | Class 7 Social à Click Here
Human Environment Interactions the Tropical | NMMS
Revison Notes | Class 7 Social à
Click
Here
Life in the Deserts | NMMS Revision Notes | Class 7
Social à Click Here
On Equality | NMMS Revision Notes | Class 7 Social à Click Here
How the State Government Works | NMMS Revision Notes |
Class 7 Social à
Click
Here
Role of the Government in Health | NMMS Revision Notes |
Class 7 Social à
Click
Here
Growing up as Boys and Girls | NMMS Revision Notes |
Class 7 Social à
Click
Here
Women Change the World | NMMS Revision Notes | Class 7
Social à Click Here
Understanding Media | NMMS Revision Notes | Class 7
Social à Click Here
Markets Around Us | NMMS Revision Notes | Class 7 Social à Click Here
A Shirt in the Market | NMMS Revision Notes | Class 7
Social à Click Here
Nutrition in Plants | NMMS Revision Notes | Class 7
Science à Click Here
Nutrition in Animals | NMMS Revision Notes | Class 7
Science à Click Here
Heat | NMMS Revision Notes | Class 7 Science à Click
Here
Acids Bases And Salts | NMMS Revision Notes | Class 7
Science à Click Here
Physical And Chemical Changes | NMMS Revision Notes |
Class 7 Science à Click
Here
Respiration In Organisms | NMMS
Revision Notes | Class 7 Science à
Click
Here
Transportation in Animals and
Plants | NMMS Revision Notes | Class 7 Science à Click
Here
Force and Pressure | NMMS
Quick Revision Notes | Class: 8 Physics à Click Here
Reproduction In Plants | NMMS
Revision Notes | Class 7 Science à
Click Here
Motion And Time | NMMS Revision
Notes | Class 7 Science à
Click Here
Electric Current and its
Effects | NMMS Revision Notes | Class 7 Science à Click
Here
Light | NMMS Revision Notes |
Class 7 Science à
Click Here
Waste Water Story | NMMS Revision Notes | Class 7 Science
à Click Here
How When and Where | NMMS Revision Notes | Class 8 Social
à Click
Here
From Trade to Territory | NMMS Revision Notes | Class 8
Social à Click Here
Ruling the Countryside | NMMS Revision Notes | Class 8
Social à Click Here
Tribals Dikus and Vision of Golden Age | NMMS Revision
Notes | Class 8 Social à
Click
Here
When People Rebel | NMMS Revision Notes | Class 8 Social à Click Here
Weavers Iron Smelters and Factory Owners | NMMS Revision
Notes | Class 8 Social à
Click
Here
Civilising the Native Educating the Nation | NMMS
Revision Notes | Class 8 Social à
Click
Here
Women Caste and Reform | NMMS Revision Notes | Class 8
Social à Click Here