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11Alexandr11 [23.1K]
3 years ago
9

Can someone please help me with this

Mathematics
1 answer:
larisa86 [58]3 years ago
8 0

Step-by-step explanation:

angel on a straight line is 180°

180-140=40°

su=40

st=180-140=40+40=80

Tsu=80

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