1 Press Ctrl-A ©G Dear2009 – Not to be sold/Free to use Composite Area Stage 6 - Year 12 General Mathematic (HSC)

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1 Press Ctrl-A ©G Dear2009 – Not to be sold/Free to use Composite Area Stage 6 - Year 12 General Mathematic (HSC)

2 Composite Areas (Add) A Triangle = 0.5 x b x h 4 m = 0.5 x 6 x 3 = 9 m 2 6 m 3 m Press A Rectangle = L x B = 6 x 4 = 24 m 2 A Total = A Triangle + A Rectangle = = 33 m 2 End of Slide

3 Composite Areas (Minus) 6 m 10 m A Large = L x B = 10 x 6 = 60 m 2 A Total = A Large - A Small = = 50 m 2 2 m 5m A Small = L x B = 5 x 2 = 10 m 2 End of Slide

4 Composite Areas (Add) Press A B A Area A = 1212 x 6cm  x 3 2 ≈ cm 2 B Area B = 6262 = 36 cm 2 Total Area Total = = cm 2 3cm End of Slide

5 Composite Areas (Minus) 4cm 6cm 8cm Area Rect = 8 x 6 = 48 cm 2 Area Circles =3 x  x 2 2 ≈ 37.7 cm 2 Area Total == = 10.3 cm 2 End of Show