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Stolb23 [73]
3 years ago
9

PLEASE HELP PELASE

Mathematics
1 answer:
charle [14.2K]3 years ago
8 0

Answer:

B.45

Step-by-step explanation:

<h3>A sum of all angles in a triangle is 180°</h3><h3>55+60+x+20=180</h3>

60+55=115

180-115=65

65-20=45

Answer: 45°

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