Question

set by using geometrical idea​

Answer 1

Answer:

A=set of all quardrilaterals. A=(Triangle, rectangle, square....)

b=set of triangle. B=(Equilateral triangle, scalene triangle acute angled triangle...)

C=(x:x=multipe of 2) c = (2,4,6)

d=(x:x=3n+1n belongs to N and n <4 )