Answers:
(i)
The negation of the statement is:
“There is at least one rectangle whose both diagonals do not have the same length.”
(ii)
The negation of the statement is:
“No policemen are thief”.
(i) Both the diagonals of a rectangle have the same length. (ii) All policemen are thieves.
(i) Both the diagonals of a rectangle have the same length. (ii) All policemen are thieves.