Practicing Success
If perimeter of a rhombus is 104 cm and length of one of its diagonals is 48 cm, then area of the rhombus (in cm2) is: |
960 240 480 1344 |
480 |
Perimeter of rhombus = 4×Side(a) = 4a = 104 a = 26 Length of one diagonal, D1 = 48 We know diagonals of a rhombus intersect each other at right angle Thus, half of diagonal D1 = 24 Now consider right angle triangle right angled at intersection of diagonals with, P=24, H=26 and B=x (Here B is half of another diagonal) H^2 = P^2 + B^2 26^2 = 24^2 + B^2 B^2 = 676 - 576 B = 10 Length of another diagonal, D2 = 2B = 20 Area of Rhombus = 0.5 (D1 D2) = 0.5 (48 × 20) = 480 The correct answer is Option (3) → 480 |