# 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.

Correct result:

α =  120 °
β =  60 °

#### Solution:

$\alpha =180-30-30=12{0}^{\circ }$
$\beta =30+30=6{0}^{\circ }$

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