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[今日一题]103,几何专题，求角B是多少度角？
[今日一题]103：如图△ABC中，已知AB=5，AC=7,BC=3,求∠B多少度？
今日一题几何专题4/18
App01:00![[今日一题]101:求三角形面积？](http://p26-sign.bdxiguaimg.com/tos-cn-i-0026/o4UHDCG7gQlpAQEClAgOvk8fBOAfC8biC9AQnA~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=hXYmrk%2BTNAOEjj0QyFKzoZIdUtI%3D)
App01:01![[今日一题]102:求三角形面积？](http://p3-sign.bdxiguaimg.com/tos-cn-i-0026/o8AwAtKvzADlfA2BLwh1GKEBeCCIUDCgLdpToA~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=XsjHhswPHn0laDZg8LOlAIBXFfg%3D)
App01:02![[今日一题]103,几何专题，求角B是多少度角？](http://p3-sign.bdxiguaimg.com/tos-cn-i-0004/oshAICANV7uEBDARbteluAfviAQz7DgAAbObyC~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=VT5kXXxnr0Igjfv2%2FVM%2BfuYzEDk%3D)
App01:09![[今日一题]104：几何专题，求角C是多少度角？](http://p26-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/d2be4f9979f94971bc40e4c8e3106a58~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=iAMnmukv7K6rIT%2FqmkORnPBeV%2Fs%3D)
App01:06![[今日一题]105：已知S△BOE=8,S△BOC=20,S△COF=10,求AEOF面积?](http://p26-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/c66b012db6894a9b88df9f2535186896~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=eY7QUx6yO9qa%2FmsRKxgC6ip1kg4%3D)
App01:06![[今日一题]106：几何专题，数学趣题，求梯形ABCD的面积？](http://p26-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/108b5c0e88704f16b9ac1391055da24d~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=z0ivcOddL6or3mX%2BidUmWv9oMQE%3D)
App01:06![[今日一题]107题，几何专题，求矩形面积是多少？](http://p3-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/795f8926e9d3438f8f7c52348fb011e6~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=iGX%2F1Q85ryBcSEu4BtiKpNEznBo%3D)
App01:04![[今日一题]108：几何专题，求阴影部分面积是多少？蝴蝶模型](http://p26-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/2ebfe7f02b0b44d992fa83ce118b5f33~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=tZShGRFDRmkdqPGjUyzIbX3HLaA%3D)
App01:07![[今日一题]109：几何专题，燕尾模型求四边形ABCD面积是多少？](http://p3-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/3471d8d32b804f67af307af75f6df934~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=y%2FsEPmLb1l2%2FKLxa0WY0ivFHFbc%3D)
App01:07![[今日一题]110：几何专题，求△ADE面积是多少？](http://p26-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/744d281f5508442381083c08f2f63c1c~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=0%2FRl5K1zAqjI7Bb6IOKb53lR8DQ%3D)
App01:03![[今日一题]111：几何专题，求矩形ABCD面积是多少？](http://p26-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/55f6ba7318614660963207f33a83f6f2~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=9xeLhJc5%2FwhxrP6VwoX5SfK%2FDVw%3D)
App01:03![[今日一题]112：几何专题，求∠B是多少度角？@](http://p3-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/f1a9c6dd28084260a77dc4caaa523536~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=UygrUw96x8svkJ5LSt83PoF14Vo%3D)
App01:03![[今日一题]113：几何专题，求阴影部分面积是多少？](http://p26-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/94db7001574341cca50d22ec4f1b5551~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=EUU1ZLZpZJ2Cr%2Fetm%2B%2FoGY2OJd0%3D)
App01:22![[今日一题]114：几何专题，求度角？](http://p26-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/ca1c7b157db641948668a3fc5f69331f~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=RfP0ed4ohPGQiN6wTvM2r2awfVc%3D)
App01:03![[今日一题]115：几何专题，求∠B是多少度角？](http://p26-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/ce7d8effdd1e4758b80e06f1d017b719~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=kFrmZqZfDpH%2BMRnsBRhCwXWv1lY%3D)
App01:03![[今日一题]116：几何专题，求四边形ABCD的面积是多少？](http://p3-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/9bf6965b89eb4db3a4f9d0f7866fac53~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=lr8DHaRHDeSu6lcDS8ZQ8YC3jGw%3D)
App01:04![[今日一题]117：几何专题，求阴影部分面积是多少？](http://p3-sign.bdxiguaimg.com/tos-cn-i-pk90l89vgd/a789e653d64244f99a2ae09b0c5d403e~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=2025010706074778D4ABB2174253FD51EA&requestFrom=704&version_code=80402&x-expires=1767737267&x-signature=8RxcCDUWtLxvhMAsWgK5TFgGl5g%3D)
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