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Whiteboardmaths.com © 2004 All rights reserved 5 7 2 1.

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Presentation on theme: "Whiteboardmaths.com © 2004 All rights reserved 5 7 2 1."— Presentation transcript:

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2 Whiteboardmaths.com © 2004 All rights reserved 5 7 2 1

3 AREA Remember: The perimeter of a shape is a measure of distance around the outside. The area of a shape is a measure of the surface/space contained within its perimeter. Area is measured in units 2 Units of distance mm cm m km 1 cm 1 cm 2 1 cm Metric Units of area mm 2 cm 2 m 2 km 2 Metric

4 AREA Remember: The perimeter of a shape is a measure of distance around the outside. The area of a shape is a measure of the surface/space contained within its perimeter. Area is measured in units 2 Units of distance mm cm m km inches feet yards miles Units of area mm 2 cm 2 m 2 km 2 inches 2 feet 2 yards 2 miles 2 1 cm 1 cm 2 1 cm 18 cm 2 6 cm 3 cm Area = 6 cm x 3 cm = 18 cm 2 Metric Imperial Metric Imperial

5 4 m 2 m 5 m 3 m 7 m 4 m Area 8 m 2 15 m 2 28 m 2 2 rows of 4 or 4 columns of 2 2 x 4 or 4 x 2 3 rows of 5 or 5 columns of 3 3 x 5 or 5 x 3 4 rows of 7 or 7 columns of 4 4 x 7 or 7 x 4 To Find the area of a rectangle simply multiply the 2 dimensions together. Area = l x w (or w x l)

6 Area Find the area of the following rectangles Not to scale 8 mm 3 mm 2 cm 20cm 5 m 4 m 1 2 3 Area = 8 mm x 3 mm = 24 mm 2 Area = 4 m x 5 m = 20 m 2 Area = 2 cm x 20 cm = 40 cm 2

7 Find the area of each rectangular shape below. 100 m 50 m 120 m 40 m 1 2 3 4 5 8½ cm 5½ cm 28 m 15 m 210 cm 90 cm Not to scale. 5 000 m 2 420 m 2 4 800 m 2 46.75 cm 2 18 900 cm 2

8 4m 3m Diagrams Not to scale Area of Compound Shapes Area = 4 x 4 + 3 x 3 = 16 + 9 = 25 m 2 16 m 2 9 m 2

9 6 cm 2 cm 8 cm 12 cm 4 cm 6 cm 2 cm 8 cm 12 cm 4 cm 24 cm 2 8 cm 2 Area = 24 + 8 + 8 = 40 m 2 2 cm 16 cm 2 12 cm 2 Area = 16 + 12 + 12 = 40 m 2

10 Area of Compound Shapes 8 m 2 m 5 m 2 m Not to scale 4 m 3 m ? ? 16 m 2 20 m 2 6 m 2 Area = 16 + 20 + 6 = 42 m 2


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