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Squares, circles, rectangles, and some triangles have more than 1 line of symmetry.
Islands
The most right angles a triangle can possibly have is 1. Any more than that, and it has to be a quadrilateral.
27 triangles. There are 16 one-cell triangles, 7 four-cell triangles, 3 nine-cell triangles, and 1 sixteen-cell triangle.
3 type of triangles are isoceles acute and obtuse triangles.