Speilinger

A triangle ABC is reflected in the white mirror line to give the triangle A'B'C'. The angles of ABC and A'B'C' are shown.

How do the angles in the two shapes compare? Is it possible to alter the yellow shape or move the mirror line so that the angles do not match?


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 du er her e2 e3 e4
f0 f1 f2 f3 f4
g0 g1 g2 g3 g4
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