一道美国数学竞赛题Circles A,B and C with radii 2,4,and 6 respectively
一道美国数学竞赛题
Circles A,B and C with radii 2,4,and 6 respectively are tangent to one another.The common external tangent to circles A and B intersects the common external tangent to circles A and C at point x.Find the measure of angle x.大意是说半径分别为2,4,6的三个圆
A,B,C两两相切,AB的公切线和AC的公切线相交于X,求X角的大小.大概是这样吧,本人不才.
poseidon526,你的答案好像有些不对啊,那个角怎么看都是钝角啊