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Inga [223]
2 years ago
9

need help to solve

Mathematics
1 answer:
mrs_skeptik [129]2 years ago
3 0

Answer:

∠ B = 65°

Step-by-step explanation:

The sum of the 3 angles in a triangle = 180°

Subtract the sum of the 2 angles from 180 for B, that is

∠ B = 180° - (78 + 37)° = 180° - 115° = 65°

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