Grouping of Images Questions

1, 6, 9 are figures which are half shaded by slanting lines.
2, 4, 7 are all divided into equal parts (either three or four parts) by straight lines and also have a black circle at the centre.
3, 5, 8 have similar designs and have their four corners shaded black.

1, 7, 8 are all undivided geometrical figures.

3, 5, 6 are geometrical figures divided into two parts.

2, 4, 9 are geometrical figures divided into four parts.

1, 3, 6 contain one complete circle each.

2, 5, 7 contain a semi-circle each. 

4, 8, 9 contain a triangle each.

2, 4, 9 have two similar elements intersecting each other.
6, 7, 8 have two different elements one placed inside the other.
1, 3, 5 have two different elements intersecting each other.

1, 2, 3 are figures composed of two straight lines.

4, 5, 6 are figures composed of three straight lines.

7, 8, 9 are figures composed of four straight lines.

1, 2, 7 are simple geometrical figures. 

3, 5, 9 have one element placed inside a different element.

4, 6, 8 have two different elements attached to each other.

1, 6, 9, are all triangles.

3, 4, 7 are all four-sided figures.

2, 5, 8 are all five-sided figures.

1,6,8 are figures composed of straight as well as curved lines

3,7,9 are closed figures shaded by oblique line segments

2,4,5 are figures composed of straight lines only.