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3.1. Kąty<br />
129<br />
9<br />
<br />
<br />
10 <br />
a) °, b) °.<br />
11 <br />
a) 42° 30′<br />
b) 63° 12′.<br />
12 <br />
60°60°.<br />
13 <br />
°α + γ + β = 360 ° .<br />
14 α + γ = β.<br />
15 α + β = γ.
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