1 The area of a square is 100cm^{2}. Find its perimeter.

2 Find the height of a trapezium with the upper base 12cm, lower base 18cm, and area 150cm^{2}.

3 One side of a rhombus is 20cm. Can you find the area? explain.

4 The base of an isosceles triangle measures 15cm and its area is 45cm^{2}. Find its height.

5 A circle has a radius of 4. Find its perimeter and area.

6 A regular hexagon has a side of 10cm, a height of 10cm and a maximum width of 10cm. Find its area.

7 A 25cm^{2} square has been cut out from a 12cm by 15cm rectangle. Find the area and perimeter of this shape.