Mensuration chapter having three formulas areas of Triangle, Parallelogram,Trapezium, square and rectangle.

1. Mensuration
by
Nilesh J Ingawale

2. Area
 Area
is the space within the boundary
of a figure.

3. Area of parallelogram
height
base
 Area of parallelogram = base x height

4. Area of a triangle
h
h
b
b
 Area = ½ x base x height
h
b

5. Area of trapezium
A
B
H
D
K
C
 Area of trapezium ABCD
=
=
=
=
area of ΔABC + area of ΔACD
(½ x BC x AH) + (½ x AD x CK)
½ x AH x (BC + AD)
½ x height x sum of parallel sides

6. Area of square
P
S
a cm
Q
a cm
 Area of square PQRS
= (side)2
= (a)2
R

7. Area of rectangle
L
O
b cm
M
N
l cm
 Area of rectangle LMNO
= length x breadth
=lxb