3-Dimensional Shapes

All of the units in the course have focused on two-dimensional shapes such as triangles, quadrilaterals  and circles.  They are called 2-dimensional because they are a flat surface that has a length and width that define their shape. This unit will focus on three-dimensional shapes.  A 3-dimensional shape is a solid that has a length, width and height that define their shape.  Examples of 3-D shapes in your everyday life are cubes (dice), cylinders (soup cans), and spheres (balls).