a square...
Yes. They can form a kite.
Yes
You cannot make four triangles our of a quadrilateral by ONE line through it. One line can give you at most two triangles. Two lines, each running from one vertex of the quadrilateral to the opposite vertex, will give 4 triangles.
4
you can't
you might get a kite if the triangles are the same then you might get a rectangle
Yes. They can form a kite.
Any 2 congruent triangles joined together will form a 4 sided quadrilateral
Yes
You cannot make four triangles our of a quadrilateral by ONE line through it. One line can give you at most two triangles. Two lines, each running from one vertex of the quadrilateral to the opposite vertex, will give 4 triangles.
All of them.
You can make any triangle, quadrilateral or pentagon with three suitable triangles.
4
you can't
You make a dimondxoxoxoxoxoxoxoxo
Put the triangles in a line alternately pointing up and down.
square and rhombus i think