25
4 rectangles
depends on what size triangles and what kind of triangles?
36
90
There are 2025 rectangles in a 9x9 grid.
25
That depends on how big the rectangles are.
4 rectangles
96 rectangles.
441
315
62 x 38 = 2356 rectangles
depends on what size triangles and what kind of triangles?
36
441
90