【摘要】九年級數(shù)學(xué)上冊(JJ)
2025-06-14 13:42
【摘要】九年級數(shù)學(xué)上冊(HS)
2025-06-14 13:55
【摘要】九年級數(shù)學(xué)上冊(JJ)CDCDDEFDEFG
2025-06-12 05:05
【摘要】九年級數(shù)學(xué)上冊(JJ)CMM
2025-06-21 08:09
【摘要】有關(guān)切線的輔助線作法一切線的性質(zhì)(教材P101習(xí)題5題)如圖1,以點(diǎn)O為圓心的兩個(gè)同心圓中,大圓的弦AB是小圓的切線,點(diǎn)P為切點(diǎn),求證:AP=BP.證明:連接OP.∵AB是小圓的切線,∴OP⊥AP=BP.圖1圖2【思想方法】圓的切線垂直于過切點(diǎn)的半徑,
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