单词：angles of refraction
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Octagon 八边形 What is a shape that has 5 lines and 5 angles? 哪种形状有五条边和五个角？ It is a pentagon. 它就是五边形。 What is a shape that has 8 lines and angles? 哪种形状有八条边和八个角呢？ It is an octagon.
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