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    reflex angle

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    reflex angleBrE /ˌriːfleks ˈæŋɡl/ 🔊NAmE /ˌriːfleks ˈæŋɡl/ 🔊 noun
    an angle of more than 180° 优角（大于 180 度的角）  ➡  compare acute angle, obtuse angle, right angle