Let a = 10 cm, b = 3 cm and c = 6 cm. Which of the following is true?

Which of the following statements is false?

In a quadrilateral ABCD, AB = 6 cm, BC = 18 cm, CD = 6 cm and DA = 10 cm. If the diagonal BD = x, then which one of the following is correct?

The length of a room is 21/16 times its breadth and breadth is 4/3 times its height. If H is the height of the room and L is the longest rod that can be placed in the room, then which one of the foll…

The diagonals of a rhombus are 8 cm and 10 cm, then the area of the rhombus is

The sides of a triangle are 5 cm, 12 cm and 13 cm. then its area is