Make correct statements by filling in the symbols $\subset$ or $ \not\subset $ in the blank spaces:
$\{ x:x$ is an equilateral triangle in a plane $\} \ldots \{ x:x$ is a triangle in the same plane $\} $
$\{ x:x$ is an equilateral triangle in a plane $\} \subset \{ x:x$ is a triangle in the same plane $\} $
Which of the following sets are finite or infinite.
The set of months of a year
In the following state whether $\mathrm{A = B}$ or not :
$A = \{ x:x$ is a multiple of $10\} ;B = \{ 10,15,20,25,30 \ldots \ldots \} $
In each of the following, determine whether the statement is true or false. If it is true, prove it. If it is false, give an example.
If $x \in A$ and $A \in B,$ then $x \in B$
What universal set $(s)$ would you propose for each of the following :
The set of right triangles
Write the following as intervals :
$\{ x:x \in R,0\, \le \,x\, < \,7\} $