如图,四边形
是半圆O的内接四边形,
是直径,
.若
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/abfdaa2c-09f4-4cfb-a48a-0276a270990e.png?resizew=163)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19a1bf64ba772922fe58b5322eb4bced.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45ea4688dfb35ddaa0b35d563431154.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3981e7286d41960daf4e110c1c84e03a.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/8/abfdaa2c-09f4-4cfb-a48a-0276a270990e.png?resizew=163)
A.![]() | B.![]() | C.![]() | D.![]() |
22-23九年级上·浙江杭州·期末 查看更多[2]
浙江省杭州市上城区2022-2023学年九年级上学期期末数学试题(已下线)专题03 垂径定理、圆周角定理、弧长与扇形面积等圆的性质及其应用五大题型-【好题汇编】备战2023-2024学年九年级数学上学期期末真题分类汇编(浙教版)
更新时间:2023-02-28 15:13:04
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【推荐1】如图,有两条公路OM,ON相交成30°,沿公路OM方向离两条公路的交叉处O点80米的A处有一所希望小学,当拖拉机沿ON方向行驶时,距拖拉机中心50米的范围内均会受到噪音影响,已知有两台相距40米的拖拉机正沿ON方向行驶,它们的速度均为10米/秒,则这两台拖拉机沿ON方向行驶时给小学带来噪音影响的时间为 ( )
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【推荐2】如图,AB是圆O的直径,BC,CD,DA是圆O的弦,且BC=CD=DA,则∠BCD等于( )
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