The length and the breadth of a rectangle are 12 cm and 9 cm respectively. Find the height of a triangle whose base is 9 cm and whose area is one-third that of rectangle.

A square has the perimeter 56 m. Find its area and the length of one diagonal correct up to two decimal places.

Find the area and perimeter of the figure (iii) given below in which all corners are right angles and all measurements are in cm.