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定理相似三角形内切圆半径比和外接圆半径比都等于相似比. 该定理证明不难,现举例说明它的应用.例1.两圆
The theorem is similar to the triangle inscribed circle radius ratio and the circumcircle radius ratio are equal to the similarity ratio. The theorem proved not difficult, now illustrate its application. Example 1. Two round