©G Dear 2010 – Not to be sold/Free to use Applications of Area, Perimeter & Volume Applied Mathematic (Preliminary General 1) Area of Composite Figures Stage 6 - Year 11 Press Ctrl-A ©G Dear 2010 – Not to be sold/Free to use

Area of Composite Figures Rectangles Press L1 = 8 cm ATotal = ARectangle +ARectangle B1 = 4 cm = L1 x B1 + L2 x B2 = 8 x 4 + 6 x 4 L2 = 6 cm = 32 + 24 = 56 cm2 B2 = 4 cm End of Slide Do Questions 1

Area of Composite Figures Triangles Press ATotal = ATriangle +ARectangle h= 7cm 15 cm = 0.5 x b x h + L x B [15-8] b= 10 cm = 0.5 x 10 x 7 + 10 x 8 B =8 cm = 35 + 80 Press L=10 cm = 115 cm2 End of Slide Do Questions 2

ATotal = ATriangle +ASemiecircle Area of Composite Figures Rectangles and Circles Press Press ATotal = ATriangle +ASemiecircle A= 0.5 x π r2 = L x B + 0.5 x πr2 D= 6 cm 14 cm [r=3] = 6 x 11 + 0.5 x π x 32 A=LB ≈ 66 + 14.1 B =11 cm [14-3] ≈ 80.1 cm2 L=6 cm End of Slide Do Questions 3 and 4

ATotal = ATriangle +AQuadrant Area of Composite Figures Rectangles and Circles Press Press ATotal = ATriangle +AQuadrant A= 0.25 x π r2 15 cm = L x B + 0.25 x πr2 r= 5 cm = 5 x 8 + 0.25 x π x 52 A=LB B =8 cm ≈ 40 + 19.6 ≈ 59.6 cm L=5 cm End of Slide Do Questions 5