School math olymp task in Russia

Autore: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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Rovnoběžnost rovin
Modifiable Right Triangular Prism
Right Triangle Inscribed in a Semicircle
Conditional Probability in Two-Way Tables
Writing and Graphing Proportional Relationships (k>0)

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Shifting Sine
angles between two planes
Reflect Points Y Axis
angle-edge-angle triangles
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