Enlargement
Move the green point through 0 into the negative. Rectangle ABCD is enlarged to give rectangle A'B'C'D'.
Make the scale factor -2. What happens to the blue rectangle compared to the yellow one?
Choose...
It is enlarged
It is reflected
It is twice as wide
It is 4 times as wide
It is 4 times the area
Result:
Please enable Java for an interactive construction (with Cinderella).
The length of the green line is called the
scale factor
.
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MathsNet
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Enlargement