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2021贵阳中考数学，求内接正三角形的面积最大值，四点共圆？
2021中考数学合集6/20
App11:09![[中考数学]10秒解二次函数压轴小题，2021泸州中考](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/28d073ecc5064e44b79dae5e9a4094e8~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=20241220050541F5280641074666A2ACF9&requestFrom=704&version_code=80402&x-expires=1766178342&x-signature=GGQM2%2BDTefrKCTW7%2FSbbkW93fXs%3D)
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