parallelograms
a rectangle
They will form a 4 sided quadrilateral if the triangles are the same sizes.
a square...
Join them together
if you put 3 triangles together you get a bigger triangle.
can two triangles put together make a square
Three triangles.
parallelograms
a rectangle
three triangles, and 1 square+2 triangles
They will form a 4 sided quadrilateral if the triangles are the same sizes.
a square...
A square already has 2 right angle triangles within it
Join them together
yes a square
Four triangles, similar to the large one, but one third the size.