Clock face

clock face is given. Numbers 10 and 5, and 3 and 8 are connected by straight lines. Calculate the size of their angles.

Result

α =  120 °
β =  60 °

Solution:

α=1803030=120\alpha =180-30-30=120 ^\circ
β=30+30=60\beta =30+30=60 ^\circ



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