Yes. They can form a kite.
2 triangles together and a parallelogram is a quadrilateral that has 2 sets of equal sides. ☺
Figure that are congruent are shapes are the same size and shape. So when two formed congruent triangles are both together they fit just right.
a square...
They will form a 4 sided quadrilateral if the triangles are the same sizes.
Just add up together their 3 sides
2 triangles together and a parallelogram is a quadrilateral that has 2 sets of equal sides. ☺
If they are congruent right angle triangles then just join them together side by side to form a parallelogram.
Two scalene right triangles that are congruent, that is, that have identical size and shape, if joined together to form a quadrilateral, will form a rectangle.
Any 2 congruent triangles joined together will form a 4 sided quadrilateral
rhombus
Figure that are congruent are shapes are the same size and shape. So when two formed congruent triangles are both together they fit just right.
a square...
They will form a 4 sided quadrilateral if the triangles are the same sizes.
rhombus
Just add up together their 3 sides
you might get a kite if the triangles are the same then you might get a rectangle
This result follows from the theorem that the sum of the angles of a triangle is 180 degrees. Drawing a diagonal in the quadrilateral splits it into two triangles and the angles of the triangles together combine to form the angles of the quadrilateral.