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Konštrukcia trojuholníka oso (všeobecne) - zskomsab
Konštrukcia trojuholníka pomocou ortocentra trojuholníka
Zostroj trojuholník ABC, ak je daná strana a = 8 cm, |BO| = 6 cm a |CO| = 5 cm, kde bod O je ortocentrum – priesečník výšok trojuholníka.