Common measures MSS1/L2.8

Skills, knowledge and understanding		Example
Adults should be taught to:
8 .	understand and use given formulae for finding areas of composite shapes (e.g. non-rectangular rooms or plots of land)	Calculate the wall area for painting, excluding doors and windows.
	know that measurements must be in the same units before calculating area
	know how to break down a composite shape into regular shapes

Sample activities

Discuss finding the perimeter of composite shapes, such as rooms, which are not drawn to scale and do not have all the measurements included, and devise ways of finding the lengths of all the edges.
Practise finding the perimeter of plans with some missing lengths, using plans drawn on plain paper so that missing lengths must be calculated from the information on other edges.
Use plans drawn on plain paper to find the areas of composite shapes. Calculate any missing dimensions, and use a formula to find the area of each component.

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