Page 15 - Mathematics Class - XI

ACTIVITY 1.3

OBJECTIVE
To verify distributive law for three given non-empty sets A, B and C, i.e., A ∪ (B ∩ C) = (A ∪ B) ∩ (A ∪ C)

MATERIAL REQUIRED
 Cardboard  White chart paper  Pair of scissors  Gluestick
 Board pins  Colour chart paper  Pencil

PRE-REQUISITE KNOWLEDGE

1. Knowledge of sets 3. Knowledge of operations on sets
2. Knowledge of Venn diagrams

PROCEDURE
1. Take a piece of cardboard of a convenient size and place a white chart paper on it with the help of board pins.

2. Take a coloured chart paper
and cut six rectangular strips U U U
of 6 cm by 4 cm from it and
paste them on a cardboard
in two consecutive rows
such that 3 of them in one
row and remaining 3 of U U U
them in the next row just
below the three rectangular
strips above.
3. Write ‘U’ in the left/right
top corner of each rectangle Fig. (a)
as shown in Fig. (a).
4. Draw three circles and mark them as A, B and C in each of the six rectangular strips as shown in Fig. (b).

U U U
A B A B A B

C C C

U U U
A B A B A B

C C C

Fig. (b)
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