August 2018 1 41 Report
Na jednym ramieniu kata o wierzchołku O odłożono kolejno odcinki OA i AB, a na drugim ramieniu OC i CD. Sprawdź, czy proste AC i BC są równoległe, jeżeli :
a) OA = 3.2 cm, AB = 5 cm, OC = 4.8 cm, CD = 7.5 cm
b) OB = 10.5 cm, OD = 17.5 cm, OA = 3.6cm, OC = 6 cm
c) OC/OD = 13/15, OB = 18 cm, OA = 16.9 cm

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