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a0 a1 a2 a3 a4
b0 b1 b2 b3 b4
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enlargementsEnlargement
The pink rectangle is an enlargement of the yellow one.

Move the points. How much bigger is the area of the pink rectangle?

Half as big
Twice as big
Three times as big
Four times as big

Result:

Please enable Java for an interactive construction (with Cinderella).