School math olymp task in Russia

Autor:Eduard

The text of the task: Given sharp angle with head point O. On one side of angle placed points A and B, OA=1, OB=5. Find point C on the other side of angle BOC, so the angle ACB is the largest.

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bewijs stelling van Pythagoras
Model sferyczny - dwunastościan-dwudziestościan
Fourier Lissajous (Mechanical)
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Trefoil Knot

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Pi Multiples (i) Complex Trigonometry
reflection across y=x
Танграм4
Στιγμιαία Ταχύτητα
hexigon bush

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Boceto
Fracciones
Función lineal
Volumen
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