Sectieoverzicht
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Enlargement or reduction of a geometric figure transforms (changes) its size but not the shape of the figure. We call this a non-rigid transformation. The enlarged or reduced shape is called the "image" of the original shape.
We multiply each side of the original shape by a scale factor to produce the enlarged or reduced image. Maps make use of scale factors to reduce the size of a geographical area, can you think of other real life uses of scale factors?
We can say that triangle EGF is an enlargement of triangle ABC or that triangle ABC is a reduction of triangle EGF.
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Leerlingen moetenAls voltooid aanduiden
Enlargement and reduction
The image and the original shape that was transformed are similar since their corresponding angles are all equal.
In the next video you will learn how to work out scale factors, and to find the lengths of the sides of the image if you are given the scale factor.
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