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valentina_108 [34]
3 years ago
15

For BRAINLY :) Triangle angle-sum theorem

Mathematics
1 answer:
PtichkaEL [24]3 years ago
4 0

9514 1404 393

Answer:

  s = 53°

Step-by-step explanation:

The sum of angles in a triangle is 180°.

  (s -20°) +(2s) + 41° = 180°

  3s +21° = 180° . . . . . . . . . . collect terms

  s +7° = 60° . . . . . . . . . . divide by 3

  s = 53° . . . . . . . . . . subtract 7°

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