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Masja [62]
2 years ago
8

If mZ1= 140, what is m_3? 900 500 1300 400

Mathematics
1 answer:
zhuklara [117]2 years ago
7 0

Answer:

∠ 3 = 50°

Step-by-step explanation:

The exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.

∠ 1 is an exterior angle of the triangle, so

90° + ∠ 3 = ∠ 1

90° + ∠ 3 = 140° ( subtract 90° from both sides )

∠ 3 = 50°

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