A.Zakharov – Resources – GeoGebra

Anticenter of the cyclic quadrilateral.
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A.Zakharov
new
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x(6) and X(187)
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A.Zakharov
4 R сonstruction X(18) X(61)
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A.Zakharov
Desargues theorem for incenters. x(1127)
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A.Zakharov