用尺规作图,找到D,使S-PCO=S-QCD
过P作QO的平行线,交AB于D。
S-PQO = S-QDO。 两边同减去S-QCO,即得S-PCO=S-QCD。
用尺规作图,找到D,使S-PCO=S-QCD
过P作QO的平行线,交AB于D。
S-PQO = S-QDO。 两边同减去S-QCO,即得S-PCO=S-QCD。
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