..........................
1. α = 180-63 = 117
β = 180-49 = 131
<span>γ = 180-68 = 112
</span>α+β+<span>γ = 360
</span>
2.
1) α = 180-126 = 54
β = 180-α-35 = 180-54-35 = 91
γ = 180-β = 180-91 = 89
<span>δ = 180-35 = 145
</span>
2) α = 180-148 = 32
<span>δ = 180-55 = 125
</span>β = 180-α-<span>δ = 180-32-125 = 23
</span>γ = 180-β = 180-23 = 157
12+15+7=35 я точно не уверен . Но я бы решил так .
8/16 = (8:8) / (16:8) = 1/2,
10/25 = (10:5) / (25:5) = 2/5,
18/27 = (18:9) / (27:9) = 2/3,
30/45 = (30:15) / (45:15) = 2/3,
200/350 = (200:50) / (350:50) = 4/7