Gas trapped in the bend of the colon lying near the spleen (splenic flexure) can cause pain in the left upper abdomen or in the left lower chest. Other symptoms and signs of the so called splenic flexure syndrome include: 1  Distension of the upper abdomen, which can be tender to touch or not.
Basic Shapes Flash Cards. Teach and learn the concept and names of some basic shapes with these free printable shapes flash cards. This set includes 2 pages with basic shapes for toddlers like the circle and star and an extra page with some more advanced shapes such as 'hexagon' and 'parallelogram'!
Definition of a Polygon. A polygon is any 2-dimensional shape formed with straight lines. Triangles, quadrilaterals, pentagons, and hexagons are all examples of polygons. The name tells you how many sides the shape has. For example, a triangle has three sides, and a quadrilateral has four sides. So, any shape that can be drawn by connecting three straight lines is called a triangle, and any shape that can be drawn by connecting four straight lines is called a quadrilateral. All of these shapes are polygons.