The area of a rhombus is 180 square cm. One of the diagonal is 20 cm. What is the ratio of the two diagonals?
Show answer & explanation
Correct answer: D
Explanation
Area of the rhombus = (Diagonal 1 × Diagonal 2) / 2
180 = (20 × Second diagonal) / 2
360 = 20 × Second diagonal
Second diagonal = 18 cm
Therefore, the ratio of the diagonals = 20 : 18
= 10 : 9