The area of a rhombus is 384 square cm. One of the diagonal is 24 cm. What is the perimeter (in cm) of the rhombus?
Show answer & explanation
Correct answer: A
Explanation
Area of the rhombus = 384 cm²
384 = 1/2 × 24 × d₂
d₂ = 32 cm
Half-diagonals = 12 cm and 16 cm
Side = √(12² + 16²)
= √400 = 20 cm
Perimeter = 4 × 20 = 80 cm