Urgent! Va rog, ajutati-ma!Fie unghiurile ∡xOy, ∡yOz si ∡zOx in jurul punctului O, astfel incat:
 \frac{1}{2} m(∡xOy)= \frac{1}{3} m(∡ yOz )= \frac{1}{5} m(∡zOx).
Masura unghiului ∡xOy este egala cu:
a. 60°
b.65°
c.70°
d.72°
Va rog frumos, vreau rezolvarea completa nu doar raspunsul final.
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