推 blackpiano:此相簿暫不開放喔 07/28 01:07
推 dearforever:如果是你網誌點進去的那一張圖~ 07/28 01:46
→ street:抱歉!!弄好了^^ 07/28 01:46
→ dearforever:過P作BC的平行線 分別和AB CD的延伸線 交於E.F兩點 07/28 01:47
→ dearforever:則AEFD為一平行四邊形 07/28 01:47
→ dearforever:三角形APD = 1/2 平形四邊形AEFD 07/28 01:48
→ street:喔喔!!好強喔^^ 07/28 01:49
→ dearforever:三角形AEP+三角形DFP = 1/2 平形四邊形AEFD 07/28 01:49
→ dearforever:則 APD = AEP + DFP = (ABP+BEP) + (DCP+CPF) 07/28 01:50
→ dearforever: = ABP + DCP + (BEP+CFP) = 10 + 13 + BPC 07/28 01:51
→ dearforever:APD = ABP + DCP + BPC 07/28 01:52
→ dearforever:我怎麼做答案都變負的= = 07/28 01:52
→ street:抱歉!我想我題目看錯數字了><!!謝謝你的解法唷^^ 07/28 01:53
推 dearforever:嗯嗯! 你參考看看囉~ 07/28 01:54
推 Rodriguez:APD的面積應該是給錯了~~? 07/28 14:02