[中學] 九年級三角形，請避免用海龍和餘弦定理
九年級的題目，我只會用海龍和餘弦做，
不知怎麼跟國中生講解，請指點！
http://m.imgur.com/a/0cB47
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※ 編輯: WWDJ (1.160.120.52), 10/10/2016 19:50:53
推
10/10 19:59, , 1F
10/10 19:59, 1F
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10/10 19:59, , 2F
10/10 19:59, 2F
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10/10 20:03, , 3F
10/10 20:03, 3F
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10/10 20:05, , 4F
10/10 20:05, 4F
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10/10 20:10, , 5F
10/10 20:10, 5F
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10/10 20:58, , 6F
10/10 20:58, 6F
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10/10 21:20, , 7F
10/10 21:20, 7F
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10/10 21:51, , 8F
10/10 21:51, 8F
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10/11 12:36, , 9F
10/11 12:36, 9F
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10/11 15:12, , 10F
10/11 15:12, 10F
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10/11 23:48, , 11F
10/11 23:48, 11F
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10/12 00:30, , 12F
10/12 00:30, 12F
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10/12 00:31, , 13F
10/12 00:31, 13F
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10/12 00:35, , 14F
10/12 00:35, 14F