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1.1 5 × 7 = 35
1.2 1 × b = opp.
Have you ever had new tiles or carpets laid in your house? What do you have to know about a room to be able to have something like this done?
1. This is the floor plan of the Vissers’ kitchen. Mrs Visser wants to lay new tiles. The tiles are each 1 m wide and 1 m long.
1.1 How many tiles do you need to cover the floor?
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1.2 How did you calculate this? Can you explain this in one or two clear number sentences?
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REMEMBER:
You multiply the length of the one side with the length of the other one.
The unit is then expressed to the power of 2 (m2).
You have just calculated the area of Mrs Visser’s kitchen floor.
1.3 Can you perhaps write down a formula for calculating the area of such a regular shape?
Area of a rectangle: ____________________________________________________
Learning Outcome 4: The learner will be able to use appropriate measuring units, instruments and formulae in a variety of contexts.
Assessment Standard 4.8: We know this when the learner investigates and approximates (alone and/or as a member of a group or team):
4.8.2: area of polygons (using square grids) in order to develop rules for calculating the area of squares and rectangles.
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