The power point help us to understand the concept of quadrilateral and different types of quadrilateral.

2. Group A Group B

3. A B
D C
mÐ A, ÐB, ÐC & ÐD = 90°.
Sides AB, BC, CD & DA
are CONGRUENT
A quadrilateral with all congruent sides and
each angle a right angle is called a square.

4. PROPERTIES OF SQUARE
P Q
O
S R
1] l (PR) = l (QS)
Diagonals of square are
congruent.
2] l(PO) = l(OR)
&
l(SO)= l(OQ)
The diagonals of a square
bisect each other.

5. R S
U T
3] mÐROS = mÐSOT = mÐUOT
= mÐUOR = 90°.
It means that the diagonals of a
square is perpendicular bisector of
the other.
Thus , each diagonals
of a square is
perpendicular bisector
of the other.
O

6. RECTANGLE
A B
D C
Ž ABCD is a quadrilateral.
mÐA , ÐB , ÐC , ÐD =90°.
Ž ABCD is a rectangle.
A quadrilateral with each angle a right
angle is called a rectangle.

7. P Q
R S
1] In a Ž PQRS,
Side PQ and side RS are
congruent
Similarly side PR and side QS
are also congruent.
Thus, it means that,
Opposite sides of a
rectangle are congruent.
2] l(PS) = l(QS),
The diagonals of the
rectangle are congruent.

8. P Q
O
S R

9. TRAPEZIUM
A B
D C

10. PARALLELOGRAM
R S
U T
In Ž RSTU,
side RS is parallel to side UT
& side RU is parallel to side ST.

11. PROPERTISE OF PARALLELOGRAM
L M
P N
1] In Ž LMNP,
seg. LM @ seg. PN,
Similarly, seg LP @ seg MN
Therefore,
The opposite sides of a
parallelogram are congruent.
2]mÐL = mÐN & mÐP = mÐM
Thus,
The opposite angles of a
parallelogram are congruent.

12. L M
P N