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SCALE DRAWING AND PATTERNS
CONTENT
- Scale Drawing of Plane Shapes
- Application of Scale Drawing in Solving Problems
- Map Reading and Scale Drawing
Scale Drawing of Plane Shapes
A scale simply means the dimension or proportion of objects in comparison to its original or actual size after the drawing. It is widely use in sciences especially in Geography, Biology, Mathematics, Physics, etc.
The scale of a drawing is determined by comparing the length of the drawing with the actual length of the object.
Scale = \(\frac{\text{length of the object after drawing}}{\text{corresponding length of object before drawing}}\)
Diameter of A = 25cm
Diameter of B = 10cm
Scale = \(\frac{10}{25} = \frac{2}{5}\)
∴ the scale is 2 to 5, i.e 2 : 5 meaning 2cm represents 5cm.
CLASS ACTIVITY
Use measurement to find the scale of the following shapes/figures:
(a)
(b)
Application of Scale Drawing in Solving Problems
In scale drawing the materials needed are pencil, ruler and set square.
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ClassHall Instructor
Ezimeruwe Oghenekaro
Halima Ahmadu
Sadiq Barau