Mathematics
Senior High
Resolved
怎麼算
A(4,4)
B(-4,4) et
4. 已知A,B,C三點的坐標分別為[4/2,45°],[4/2,135°] [6,270], O 為原點,則凹四
邊形 AOBC的面積為【12+42]平方單位。(20分)
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