Composite Shapes

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Composite Shapes
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• What is your favorite song?...

A song is an example of a composition. It is
composed of drums, guitar, singing, and perhaps
some hip hop record scratching.
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How does a musician compose a song?
drums
piano
vocal
guitar
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Engineers, architects, and graphic designers are
composers as well.

• Instead of using instruments, they use simple
  geometric shapes to construct everything from
  bridges, to air planes, to video games.

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Skateparks
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All composite shapes can be broken down into a
collection of simple shapes
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Do not copy this page down.
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Composite shapes are used all the time in art and
graphic design.
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Video game design..
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Superheros
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How would you divide this shape up?
A rectangle and 2 semi-circles
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A3
A1
A2
Atotal A1 A2 A3
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Atotal A1 A2 A3
A1
A2
A3
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• How?

Atotal A1 - A2
A1
A2
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1. Find the area

• 10 cm

A1
2 cm
7 cm
A A1 A2
12 cm
A2
10x2 10x3
10 cm
20 30
50 cm2
3 cm
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2. Find the area of the grey region
A ?r2
Ay A1 - A2
A1

• 10cm

Ay ?(10)2 - ?(3)2
Ay ?100 - ?9
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Ay 285.7 cm2
A2
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• Complete the
• 10 composite shapes activity.
• Include
• Diagram
• Steps
• Circled answer