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Rotation
The blue triangle is a rotation of the yellow triangle.
A is rotated to D, B is rotated to E and C is rotated to F. Also shown are the perpendicular bisectors of AD, BE and CF.

What do you notice about the perpendicular bisectors?


Result:
Please enable Java for an interactive construction (with Cinderella).
a0 a1 a2 a3 a4
b0 b1 b2 b3 b4
c0 c1 c2 c3 c4
d0 d1 d2 d3 d4
e0 e1 e2 e3 e4
f0 you are here f2 f3 f4
g0 g1 g2 g3 g4
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