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並前往https://www.khanacademy.org/math/cc-seventh-grade-math/cc-7th-geometry/cc-7th-angles/a/complementary-and-supplementary-angles-review

Complementary and supplementary angles review - Khan ...

A common case is when they form a right angle. Show me. Supplementary angles. Supplementary angles are two angles with a sum of ...

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