Drawing

1
Drawing
2
Presentation scope

• This presentation is purely for you to practice
  
• Drawings of different object views
• Calculating the material required

3
Area

• Materials such as plastic and plywood are sold
  per square metre

6 square metres
2 metres
1 metre
1 square metre
3 metres
1 metre
4
Exercise

• I wish to cover the roof of the chicken hut in
  plastic sheeting to make it waterproof.
• How much plastic should I buy?
• How much should I buy to cover the bamboo hut
  roof?
• How much should I buy to cover the weather
  station roof?

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Your Turn!
Now find the area of the roof of your design!
?
SCALE
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Area of a Triangle
Area 0.5 x base x height
Height
4 metres
4 metres
Height
8 square metres
10 square metres
4 metres
Base
5 metres
Base
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Drawing

• I wish to paint all four sides of the bamboo hut
  and weather station.
• I wish to cut two new full metal panels for the
  ends of the chicken hut, and paint them.
• How many pots of paint do I need?
• How much will it cost?

1 pot paints 2 square metres
50 rupees per pot
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Your Turn!
Now find the areas of the walls of your design!
SCALE
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Activity 1
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Activity 2
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Activity 3
12
Drawing
SCALE
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Circles
Circumference
3.14
Area x radius2
Diameter
(radius2 radius x radius)
Circumference
hello x diameter
Radius
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Drawing

• What is the area of the base of your water tank?
  

Area x radius2
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Volume

• Volumes are measured in cubic metres

1 metre
1 metre
1 cubic metre
1 square metre
1 metre
1 metre
1 metre
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Drawing
2 metres
2 metres
12 cubic metres
1 cubic metre
3 metres
0.5 metres
1 metre
2 metres
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Volume of a Cylinder
Area of circle x radius2
2 metres
radius
(radius2 radius x radius)
Area of circle 3 x 2 x 2
36 cubic metres
12 m2
3 metres
height
Volume cylinder Height x Area
Volume cylinder 3 x 12
36 m3
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Drawing

• How many litres of water can my tank hold?
• Hint 1 cubic metre 1000 litres