3. DIFFERENT TYPES OF QUADRILATERALS
RECTANGLE
Opposite sides are equal.
Opposite sides are parallel.
Angles are right angled.
Diagonals are equal.
Diagonals bisect each other.
4. SQUARE
All sides are equal.
Opposite sides are parallel.
Angles are right angled.
Diagonals are equal.
5. PARALLELOGRAM
Opposite sides are equal.
Opposite sides are parallel.
Diagonals are bisects each other.
Opposite angles are equal.
Sum of angles on same side is 180 degree.
6. RHOMBUS
All sides are equal.
Opposite sides are parallel.
Opposite sides are equal.
Sum of angles are same side.
7. TRAPEZIUM
One pair of opposite sides is parallel.
Sum of angles on nonparallel sides is 180 degree.
8. CHAPTER 2
AREA OF QUADRILATERALS
RECTANGLE
b
l
Area of rectangle=lb
l - Length
b - Bredth
Exercise
1. Length of a rectangle is 12 cm and breadth s 10 cm. Find the area of the
rectangle.
9. SQUARE
a
a
Area of square = a2
A = length of one side
Exercise
1. Length of one side of a square is 15 cm. find its area.
10. PARALLELOGRAM
b
Area of parallelogram = bh
b = base
h = height
Exercise
1. Length of base of a parallelogram is 9 cm and its height is 5 cm. find its
area.
h
11. RHOMBUS
Area of rhombus= ½ d1d2
d1,d2= length of diagonals
Exercise
1. Find the area of a rhombus having diagonals of length 12 cm and 15 cm.
12. TRAPEZIUM
Area=1/2 h(a+b)
h - Height
a,b - length of two parallel sides
Exercise
1. Length of parallel sides of a trapezium are 9 cm and 12 cm and its height is 7
cm. find its area.
