13问答网 > 己知弦长16米拱高1.5米求弧长和半径

己知弦长16米拱高1.5米求弧长和半径

2025-03-15 15:33:02
推荐回答（4个）
回答1：

半径约22.08米，弧长约16.36米，

回答2：

解。过圆心作弦的中垂线得到直角三角形.
利用勾股定理求得半径.三角函数值求得圆心角，弧长.
设半径为r^2=8^2+（r-1.5）^2
解得r=22.083m，
圆心角为2a，a=arcsin8/22.083
2a=16.585*2=32.17°
弧长=32.17*22.083/180 =3.946米

回答3：

设圆的半径为x米，则
8*8+（x-1.5）（x-1.5）=x*x

回答4：


？。。。。。。。。。。。。。

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