The length of the diagonal of a square is 12 cm. Find its area and perimeter. Choose one:
A) 31.84 cm	B) 33.84 cm	C) 35.84 cm	D) 38.84 cm	E) 38.92 cm

Rationale: diagonal of a square = 12 cm area of square = 1 / 2 ( d ) ² = 1 / 2 ( 12 ) ² = 1 / 2 × 12 × 12 = 72 side of a square = √ area = √ 72 = √ ( 2 × 2 × 2 × 3 × 3 ) = 2 × 3 √ 2 = 6 × 1.41 = 8.46 cm perimeter of square = 4 × 8.46 = 33.84 cm answer option : b
Answer: B