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色k 发表于 2022-6-25 14:40 如图,取点 `G` 使 `GB\perp AB` 且 `\angle GAB=30\du`,则 `GA=2GB`,又由条件 `AF=2BE`,且 `\angle GA ...
babyqq 发表于 2022-6-26 00:20 DG=根号7 怎么算的
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乌贼 发表于 2022-6-26 02:21 美妙是$ EFCG $四点共圆
babyqq 发表于 2022-6-26 05:10 可以用四点共圆做这题吗?
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