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| ex·te·ri·or an·gle (plural ex·te·ri·or an·gles) |
noun |
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| Definition: |
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1. angle on the outside of a polygon: an angle on the outside of a polygon, formed between a side and an extension of an adjacent side
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2. angle formed by a line crossing lines: any of four angles formed on the outside of a pair of lines that are crossed by a third line
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