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Rotation
Use your mouse to rotate the pink square.
In how many different positions does it cover the yellow square exactly?
0 1 2
3 4 5

Result:

Please enable Java for an interactive construction (with Cinderella).
a0 a1 a2 a3 a4
you are here b1 b2 b3 b4
c0 c1 c2 c3 c4
d0 d1 d2 d3 d4
e0 e1 e2 e3 e4
f0 f1 f2 f3 f4
g0 g1 g2 g3 g4
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