Irregular shapes are those with sides of different lengths and angles that are unequal. Regular shapes have sides with equal lengths and have angles of the same size.
Know MoreShapes like squares and equilateral triangles are considered regular shapes because they have predictably identical sides and angles. If a person were to take an equilateral triangle and make each of the sides different lengths and change the size of each angle, the regular-shaped triangle would turn into an irregular shape. Irregular shapes do not have to look messy or weird, though; a shape that resembles a rectangle with a chunk cut out of it can be considered irregular, even though it is composed of straight lines and has a neat and orderly appearance.
Learn more about ShapesSome commonly-known shapes are squares, circles, triangles, stars and rectangles. There are many different kinds of polygons used in geometry and many shapes that combine or arrange multiple polygons to be used in designs.
Full Answer >Three-dimensional shapes are solid shapes that exist in three dimensions, which include length, width and depth. The main difference between 3-D shapes and 1-D or 2-D shapes is that depth is incorporated along a third axis outside of the original 2-D plane.
Full Answer >Two-dimensional, or 2-D, shapes are those that exist in only two dimensions while three-dimensional, or 3-D, shapes exist in three dimensions. Both 2-D and 3-D shapes typically have length and width dimensions, also referred to as "x" and "y" dimensions, but 3-D shapes also have a depth dimension in the "z" direction.
Full Answer >A tangram set is made up of one square, one parallelogram and five triangles. Two of the triangles are small at half the size of the square. One triangle is three times the size of the small triangles, and two triangles are six times the size of the small triangles.
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