Find the perimeter and area of a square of side 9 cm.  Pick.
A) 36
B) 49
C) 64
D) 81
E) 100

Rationale: "we know that the perimeter of square = 4 ã — side side = 9 cm therefore , perimeter = 4 ã — 9 cm = 36 cm now , area of the square = ( side ã — side ) sq . units = 9 ã — 9 cm â ² = 81 cm â ² answer : d"
Answer: D