Enlargement
Move the green point. Rectangle ABCD is enlarged to give rectangle A'B'C'D'.
Make the scale factor 3. What happens to the area of the blue rectangle compared to the yellow one ?
Choose...
Nothing much
It has increased by 3
It has increased by 6
It has increased by 9
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
.
©
MathsNet
2001
Enlargement