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2.如圖,圓O1、O2相交C、D兩點,已知圓O1半徑13,圓O2半徑20,=,其外公切線交兩於A、B兩點,連接=?(10分)(註:132=169,142=196,202=400,212=441)
問題詳情
2.如圖,圓O1、O2相交C、D兩點,已知圓O1半徑13,圓O2半徑20,
=
,其外公切線交兩於A、B兩點,連接
=?(10分)
(註:132=169,142=196,202=400,212=441)
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