㺧ҹ 3.1

            ѭҷ 1    äӹdzҾ鹷ͧٻ     ҡٵ 鹷 = 1/2 x ҹ x ٧    ѭҷ 1     鹵͹ѧ

1. ˹ѵػʧͧҹ

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2. ԨóҢʹȹ͡

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3. ԨóҢŹ

             ¡â         Ҵ         ѡɳТ        ҧ
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4. ԨóԸաûż

Ըաûżʴ繢鹵͹Ըմѧ
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㺧ҹ 3.1
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