if u are talking about polygons then u would get a hexagon
a rectangle
They will form a 4 sided quadrilateral if the triangles are the same sizes.
BOTH! halve then both diagonaly and yess you can
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.
An isosceles triangle has two sides the same length and one different. Two isosceles triangles is just two triangles like that. Unless you put them together and then you get a rectangle. I don't know if that was the answer you were looking for but that's all I got.
a rectangle
can two triangles put together make a square
yes a square
You get the shape of an envelope with its flap open.
square and 2 triangles put together
They will form a 4 sided quadrilateral if the triangles are the same sizes.
a rectangle or square
The will form a rectangle.
BOTH! halve then both diagonaly and yess you can
Because otherwise you would have found the area of the rectangle/square (the rectangle/square being if you put two of the triangles together).
Sliding them together makes a Big Triangle, flipping them makes a Diamond.
if you put 3 triangles together you get a bigger triangle.