用尺規作圖,找到D,使S-PCO=S-QCD
過P作QO的平行線,交AB於D。
S-PQO = S-QDO。 兩邊同減去S-QCO,即得S-PCO=S-QCD。
用尺規作圖,找到D,使S-PCO=S-QCD
過P作QO的平行線,交AB於D。
S-PQO = S-QDO。 兩邊同減去S-QCO,即得S-PCO=S-QCD。
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