探索三角形的内角和是180°-实验教学视频

Name: 探索三角形的内角和是180°-实验教学视频
Uploaded: 2026-02-27T11:30:00.000Z
Duration: 42 min 11 s
Channel: wwenhhh
Description: https://basic.smartedu.cn/syncClassroom/prepare/detail?lessonId=ff808081-5c3d-57db-015c-3ef381731d67&chapterId=9302b443-4b3b-3990-bb1e-b14f9e62d2c5&teachingmaterialId=1b31b5a2-3f2f-d12c-8493-5575b0450

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2026-02-27 19:30:00

https://basic.smartedu.cn/syncClassroom/prepare/detail?lessonId=ff808081-5c3d-57db-015c-3ef381731d67&chapterId=9302b443-4b3b-3990-bb1e-b14f9e62d2c5&teachingmaterialId=1b31b5a2-3f2f-d12c-8493-5575b0450

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