1 press ctrl-a ©g dear 2010 – not to be sold/free to use perimeter of composite figures stage 6 -...
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©G Dear 2010 – Not to be sold/Free to use
Perimeter ofPerimeter ofComposite FiguresComposite Figures
Stage 6 - Year 11Stage 6 - Year 11
Applied Mathematic(Preliminary General 1)
2
Composite RectanglesFind the missing values.
8 m
6 m
4 m
4m a
b b
c
a = 4m ,b = (8 – 4) ÷ 2 = 2.
c = 6m ,4 m
2 m2 m
6 m
3
Composite RectanglesFind the missing values.
8 m
6 m
4 m
4m 4 m
2 m2 m
6 m
End ofSlideDo Questions 1
a = 4m ,b = (8 – 4) ÷ 2 = 2.
c = 6m,
Perimeter = 4m +6m +2m +4m +8m +4m +2m +6m
= 36 m
4
5cm
5cm
Triangles and Rectangles
Press
Press
12 cm
End ofSlide
h= 4cm
6 cm
6 +Perimeter =
8 cm
b= 6 cm
Do Questions 2
Pythagoras Theorem
3cm
8 cm 8 +5 +5 +8=36 cm
5
9.4 cm
End ofSlide
Circumference of CirclesPres
s
14
cm
2 π r
D= 6 cm
L=6 cm
B 11 cm
Do Questions 3 and 4
P = 0.5 x
11 cm
[r=3cm]2 π 3+ 11+ 6+ 11
≈ 9.4 +28≈ 37.4 cm
6
14.1 cm
15 cm
End ofSlide
Circumference of CirclesPres
s0.25 x
2 π
r
r= 9 cm
L=9 cm
B 6 cm
Do Questions 5
P = 0.25 x2 π 9+ 6+ 9+ 15≈ 14.1 +30≈ 44.1 cm
6 cm
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