If the figure 6 is composed of 24 equilateral triangles ,the
If the figure 6 is composed of 24 equilateral triangles ,then how many non-congruent distinct right triangles with vertices on the intersecting points are possible in this figure?( ) A 3 B 4 C 5 D 6 - - 、、、我图不能传、、、、怎么办?