The document discusses how to calculate the area of different shapes. It explains that the area of a parallelogram is equal to its base multiplied by its height. The area of a triangle is equal to one-half the base multiplied by the height. The area of a trapezium is equal to one-half the height multiplied by the sum of the parallel sides.

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
D
H
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