初中数学解题模型:圆中的相交弦模型
![](http://pic.ikafan.com/imgp/L3Byb3h5L2h0dHBzL2ltYWdlMTA5LjM2MGRvYy5jbi9Eb3dubG9hZEltZy8yMDIxLzAxLzE5MTIvMjEzNDAwMTQ5XzFfMjAyMTAxMTkxMjQ3MTkyNTQ=.jpg)
![](http://pic.ikafan.com/imgp/L3Byb3h5L2h0dHBzL2ltYWdlMTA5LjM2MGRvYy5jbi9Eb3dubG9hZEltZy8yMDIxLzAxLzE5MTIvMjEzNDAwMTQ5XzJfMjAyMTAxMTkxMjQ3MTk0MDA=.jpg)
相交弦定理同弦切角定理一样,非解答题可以直接应用,解答题中要证明其正确性,即将上面的理论依据重现即可
【典型例题1】
![](http://pic.ikafan.com/imgp/L3Byb3h5L2h0dHBzL2ltYWdlMTA5LjM2MGRvYy5jbi9Eb3dubG9hZEltZy8yMDIxLzAxLzE5MTIvMjEzNDAwMTQ5XzNfMjAyMTAxMTkxMjQ3MTk1NDE=.jpg)
【答案解析】解:
![](http://pic.ikafan.com/imgp/L3Byb3h5L2h0dHBzL2ltYWdlMTA5LjM2MGRvYy5jbi9Eb3dubG9hZEltZy8yMDIxLzAxLzE5MTIvMjEzNDAwMTQ5XzRfMjAyMTAxMTkxMjQ3MTk2MTk=.jpg)
【典型例题2】
![](http://pic.ikafan.com/imgp/L3Byb3h5L2h0dHBzL2ltYWdlMTA5LjM2MGRvYy5jbi9Eb3dubG9hZEltZy8yMDIxLzAxLzE5MTIvMjEzNDAwMTQ5XzVfMjAyMTAxMTkxMjQ3MTk3Mjk=.jpg)
【答案解析】
![](http://pic.ikafan.com/imgp/L3Byb3h5L2h0dHAvaW1hZ2UxMDkuMzYwZG9jLmNuL0Rvd25sb2FkSW1nLzIwMjEvMDEvMTkxMi8yMTM0MDAxNDlfNl8yMDIxMDExOTEyNDcxOTgwNw==.jpg)
【典型例题3】
![](http://n4.ikafan.com/assetsj/blank.gif)
【答案解析】
![](http://n4.ikafan.com/assetsj/blank.gif)
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相交弦定理同弦切角定理一样,非解答题可以直接应用,解答题中要证明其正确性,即将上面的理论依据重现即可
【典型例题1】
【答案解析】解:
【典型例题2】
【答案解析】
【典型例题3】
【答案解析】