4m 3m Diagrams Not to scale Perimeter of Composite Shapes ? ? ? Perimeter = 4 m + 7 m +3m + 1m += 22m 4m 3m 1m.

Presentation on theme: "4m 3m Diagrams Not to scale Perimeter of Composite Shapes ? ? ? Perimeter = 4 m + 7 m +3m + 1m += 22m 4m 3m 1m."— Presentation transcript:

4m 3m Diagrams Not to scale Perimeter of Composite Shapes ? ? ? Perimeter = 4 m + 7 m +3m + 1m += 22m 4m 3m 1m

? ? Perimeter of Composite Shapes 8 m 2 m 5 m 2 m Not to scale Perimeter = 2 m + 5 m +4 m +2 m + 5 m +8 m = 30 m 4 m 5 m

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

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

Area of Composite 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

The Circumference of a Circle Find the perimeter of the following semi-circles. C =  d C = 2  r 8 cm 1 9.5 cm 2 Perimeter = ½  d + d = ½ x  x 8 + 8 = 20.6 cm (1 dp) Perimeter = ½  d + d = ½ x  x 9.5 + 9.5 = 24.4 cm (1 dp)

Perimeter = ¼ ( 2  r) + 2r = ¼ x 2 x  x 6 + 2 x 6 = 21.4 cm (1 dp) Perimeter = ¾(2  r) + 2r = ¾ x 2 x  x 8.5 + 2 x 8.5 = 57.1 cm (1 dp) The Circumference of a Circle Find the perimeter of the ¼ and ¾ circles. C =  d C = 2  r 3 4 6 cm 8.5 cm

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