PQR is a right triangle. It is free to move so that P is always on the x-axis and R is on the y-axis. Show that the point Q (right angle) always lies on a straight line passing through the origin.
Born in Moscow. Graduated from the Moscow Lomonosov University (MSc, PhD).
Skills and interests: Fiction writing (Poetry, Prose), Applied Mathematics, International Education, Mathematical Education, Philosophy, Tennis.
Since 1989 lives in Switzerland (Lausanne, Geneva).
Married. Six children.
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