Elements of Art/Shape
Shapes are created with lines in a given space, either real or imaginary. Shapes can be endlessly rotated. There can be organic shapes or geometric shapes.
A circle is a shape with only one side created from a single, continuously curved line which encompasses the whole of the shape.
A triangle is a shape comprised of three straight lines which meet at three endpoints - the bottom side is horizontal, and the other two sides are diagonal, meeting each other at a point.
A square is a shape which is made of four straight lines which intersect at four points at 90 degree angles: the top and bottom lines are parallel to one another, as are the two lines comprising the sides of the square. In a square, each of the sides is the exact length of the other sides (a rectangle is a different shape where the opposing sides are equal in length; thus, all squares are rectangles but not all rectangles are squares.)
A shape with 5 sides. The bottom side is horizontal, there are two vertical sides that are parallel and the two top sides are diagonal.
A common use of the pentagon is to draw a house.
A shape with six sides. 4 sides are diagonal and 2 are horizontal.
A cube has 8 endpoints, 12 edges and 6 faces. At every endpoint 3 lines intersect, and at an intersection any two edges are perpendicular to each other. Finally every edge has the same length.
Putting shapes together
Most shapes in art are combinations of the shapes described above. They may be expressed (that is, they have a clear outline) or implied (the viewer has to seem them for his/herself).
Also, different shapes can be put together for interesting results.