The document defines and describes different types of quadrilaterals. It states that a quadrilateral is a closed figure bounded by four line segments. The sum of the interior angles of any quadrilateral is always 360 degrees. The main types of quadrilaterals discussed are trapezium, parallelogram, rectangle, rhombus, square, and kite. Each shape is defined by the properties of the lengths and orientations of its sides.

2. INTRODUCTION
 QUADRILATERAL – A closed figure,in a
plane bounded by four line segments is
called a quadrilateral.
C
D
A B

3. ANGLE SUM PROPERTY OF
QUADRILATERAL
 The sum of all the angles of a
quadrilateral is 360°.This can be verified
by drawing a diagonal and dividing a
quadrilateral into two triangles.
D C
A B

4. TYPES OF QUADRILATERALS
 Trapezium
 Parallelogram
 Rectangle
 Rhombus
 Square
 Kite

5. TRAPEZIUM
 A quadrilateral in which one pair of
opposite side is parallel is called a
TRAPEZIUM.
 In figure , ABCD is a trapezium because
here ,AB II DC.
A
Parallel sides never meet.
A B
D C

6. PARALLELOGRAM
 A quadrilateral in which both pairs of
opposite sides are parallel is called a
PARALLELOGRAM.
 In the figure , ABCD is a parallelogram
because ABIIDC and DAIICB.
A B
Indicates equal
sides
D C

7. RECTANGLE
 It is a special parallelogram whose one
angle is right angle.
 In the figure , ABCD is a rectangle
because ABIICD and ADIIBC and A=90°.
B
Indicates equal sides
Box indicates 900 angle
A
D C

8. RHOMBUS
 It is a special parallelogram whose all
sides are equal.
 In the figure , ABCD is a rhombus
because ABIICD , ADIIBC and
AB=ABC=CD=DA. B
D C
All four sides are equal

9. SQUARE
 It is a special parallelogram in which all
the sides are equal and one angle is right
angle.
 In the figure , ABCD is a square because
ABIICD ,ADIIBC and AB=BC=CD=DA and
A=90°. Indicates equal sides
Box indicates 900 angle

10. KITE
 A quadrilateral in which two pairs of
adjacent sides are equal is called a KITE.
 In the figure , ABCD is a kite because
AD=CD and AB=BC.
Indicates equal
sides

11. 1.Karan Singh Rawat
2.Abhishek Bhardwaj
3.Samarth Sharma
4.Harshit Sharma
5.Atul Kumar
6.Paras Gupta
7.Diwaker Baggan
8.Nitin Mehta