Posted by abonumilian on Thursday, December 9, 2010 at 8:44am.
wie bestimme ich den drehpunkt von zwei dreiecken?

mathematik  Reiny, Thursday, December 9, 2010 at 8:51am
or
How do I determine the turning point of 2 triangles?

mathematik  MathMate, Thursday, December 9, 2010 at 10:18am
I believe the question is to find the centre of rotation of two given congruent triangles, ABC, and A'B'C'. The centre of rotation (drehcentrum) Z is the intersection of the perpendicular bisectors of BB' and that of CC' (both lines not shown in figure).
See figure (for construction of A'B'C':
http://www.blikk.it/angebote/primarmathe/ma2275.htm
(edited: 10:18)
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