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北京中考大题：圆与切线，正弦值，平行线
北京中考大题：圆与切线，正弦值，平行线
海莱中考数学59/358
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App33:24![中考必备：“铅垂法”求三角形面积[更正：C（1，-2）]](http://p3-sign.bdxiguaimg.com/tos-cn-i-0026/1d04179977e74d05ace4a5e0e1dc35bc~tplv-pk90l89vgd-crop-center:576:324.jpeg?appId=3586&biz_tag=list_custom%2Fnone&channelId=0&customType=custom%2Fnone&from=704_middle_image&imageType=list&isImmersiveScene=0&is_ios=1&is_stream=0&lk3s=9d3f5bff&logId=2025022709440838EE59F326ACB4B9DC95&requestFrom=704&version_code=80402&x-expires=1772156649&x-signature=dTW%2F%2FTcS%2Bj4c8UAOhgiMNszcBW8%3D)
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