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甲

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3.8

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A

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1

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B

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79ABCB90AB3AC5ACDEACDEABCDADBCMNACODOBACODC48ABCDCEFGTFGPD52yxABCOBCF

OA3CEF三解題第19題8分，第題8分共16分）812

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ADBC四解題分）8

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12n32五解題10分101

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八解題10分10Oykx+b42xCOC123MOA

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n

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3151515

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平行四邊形

hAEPQEFBQEPEF

菱形

S

四邊形

EFBQEFABEPAABCABCADCADEAEP

2ADAGQABBACADADBEQQBEQBF3EFAD

菱形

四邊形

EFBQADABBACADBCEQEFBQENABS

菱形

四邊形

EFBQ八解題10分1Akb2C

P1212P1212OBC3M0MyMnAMmy+bA43k3k7yx+72x2yx25B