16 small, 3 made of 9 (one for each corner), and the entire thing. 26?
EDIT: 16 small, 7 made of 4, 3 made of 9, 1 made of 16, so 16+7+3+1=27?
16 small, 3 made of 9 (one for each corner), and the entire thing. 26?
EDIT: 16 small, 7 made of 4, 3 made of 9, 1 made of 16, so 16+7+3+1=27?
RE: How Many Triangles Are There?