下列说法:
①三点确定一个圆;②相等的圆周角所对的弧相等;③同圆或等圆中,等弦所对的弧相等;④等边三角形的内心与外心重合.
其中,正确的个数共有( )
Before,I didn't like winter.Now,I love to play in the snow.