求弦BC的长(圆周角定理、垂径定理和解直角三角形)
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/08/08 15:47:05
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![求弦BC的长(圆周角定理、垂径定理和解直角三角形)](/uploads/image/z/20107570-58-0.jpg?t=%E6%B1%82%E5%BC%A6BC%E7%9A%84%E9%95%BF%28%E5%9C%86%E5%91%A8%E8%A7%92%E5%AE%9A%E7%90%86%E3%80%81%E5%9E%82%E5%BE%84%E5%AE%9A%E7%90%86%E5%92%8C%E8%A7%A3%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E5%BD%A2%29)
解题思路: 给定半径,求弦长,很明显需要作垂径,通过解由半径、弦到圆心的距离、弦的一半构成的三角形来解决.
解题过程:
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最终答案:略
解题过程:
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最终答案:略