For the two right triangles, they are not similar because the ratio from side to its corresponding side is not the same. (6:7 and 4:5)
For the other triangles, they are similar because the ratio from a side to its corresponding side is the same. (2:3)
The rectangles are not the same because the ratio from one side to its corresponding side is not the same with all of them. (1:2 and 7:10)
The squares, yes, because they're both squares.