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3 July, 23:27

In triangle XYZ, m∠Z > m∠X + m∠Y. Which must be true about △XYZ?

m∠X + m∠Z < 90°

m∠Y > 90°

∠X and∠Y are complementary

m∠X + m∠Y < 90°

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Answers (1)
  1. 4 July, 03:14
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    M∠Z > m∠X + m∠Y

    m∠X + m∠Y + m∠Z = 180°

    m∠X + m∠Y = 180° - m∠Z

    m∠Z > 180° - m∠Z

    2 m∠Z > 180° / : 2

    m∠Z > 90° (A, B and C are not possible)

    Answer:

    D) m∠X + m∠Y < 90°
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