1. What do you do if you are trying to find an area and the lengths of the shape does not have any units?

Give the answer as units2

2. How do you find the areas of shapes that are not made up of squares or rectangles etc.?

You have to make approximations.

For example in a shape like the plan of a house, break it down into a number of rectangles and squares.

3. Which units are used to measure large ares such as the area of an ocean?

The largest unit commonly used is square kilometres (km2)

4. What has to be done if one measurement is in one unit and the other in a different unit?

Before multipying, both measurements must be in the same units.

e.g. If the length of a rectangle is given as 2 metres and the width as 50 centimetres, one way would be to change 2 metres into 200 centimetres. Then the area can be found by multiplying 200 by 50 to give an area of 10 000 square centimetres.