2012 · Q69
The sides of a parallelogram are 12 cm and 8 cm long and one of the diagonals is 10 cm long. If d is the length of other diagonal, then which one of the following is correct?
Elementary MathematicsGeometry
- Ad < 8 cm
- B8 cm < d < 10 cm
- C10 cm < d < 12 cm
- Dd > 12 cm
Explanation
By the parallelogram law d^2 = 2(144+64) - 100 = 316, so d = 17.8 cm > 12 cm.