设d是⊙O1与⊙O2的圆心距,r1,r2(r1>r2)分别是⊙O1和⊙O2的半径,则
⊙O1与⊙O2外离?d________;
⊙O1与⊙O2外切?d________;
⊙O1与⊙O2相交?d________;
⊙O1与⊙O2内切?d________;
⊙O1与⊙O2内含?d________;
⊙O1与⊙O2为同心圆?d________.
网友回答
>r1+r2 =r1+r2 r1-r2<d<r1+r2 =r1-r2 0≤d<r1-r2 =0
解析分析:根据两圆位置关系与圆心距d,两圆半径r1,r2(r1>r2)的数量关系间的联系,即可得到