Some examples of two dimensional shapes include squares, triangles, circles and rectangles. A two dimensional shape can be measured by the two dimensions of length and width but not by its depth.
Know MoreThe closest one can come to actually seeing a two dimensional shape is by looking at a paper cut out of one. The paper has thickness, however, so even these shapes are technically three dimensional. Three-dimensional shapes, such as cubes, pyramids and spheres, can be measured in the three dimensions of length, width and depth.
Some two dimensional shapes are known as polygons. A polygon is a shape with three or more straight sides that is closed. Triangles, squares and pentagons are classified as polygons. A polygon cannot have rounded sides, like a square, or intersecting sides, like an hourglass shape. In some instances, however, a circle is considered to be polygon that has an infinite number of sides. A polygon that has equal measurements for all of its sides and angles is known as a regular polygon. Squares and equilateral triangles are examples of regular polygons.
In addition to measuring the sides and angles of two-dimensional objects, its also possible to measure the shapes' perimeter and area. The perimeter is how long all the sides of the shape are when added together. The area represents how much space is inside the shape.
Learn more about ShapesA 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.
Full Answer >Some 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 >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 >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.
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