2D object Has a non-zero area Polygon Symmetric (by reflection) Can be divided into three or fewer triangles Contains at least one right angle Convex Sum of interior angles doesn't exceed 360° Has an even number of edges All edges have equal length

2D object Has a non-zero area Polygon Symmetric (by reflection) Can be divided into three or fewer triangles Contains at least one right angle Convex Sum of interior angles doesn't exceed 360° Has an even number of edges

2D object Has a non-zero area Polygon Symmetric (by reflection) Can be divided into three or fewer triangles Contains at least one right angle Convex Sum of interior angles doesn't exceed 360°

2D object Has a non-zero area Polygon Symmetric (by reflection) Can be divided into three or fewer triangles Contains at least one right angle Convex

2D object Has a non-zero area Polygon Symmetric (by reflection) Can be divided into three or fewer triangles Contains at least one right angle

2D object Has a non-zero area Polygon Symmetric (by reflection) Can be divided into three or fewer triangles

2D object Has a non-zero area Polygon Symmetric (by reflection)

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