Three-dimensional shapes (Year 9)

Two Dimensional: Having only two dimensions, such as width and height but no thickness.

Three-Dimensional : Having three dimensions (such as height, width and depth), like any object in the real world.

Triangles: A triangle has three sides and three angles. The three angles always add 180° 

Quadrilateral:  A Quadrilaterals has four-sides, it is 2-dimensional (a flat shape), closed (the lines join up) and has straight sides.

Prism: A solid object with identical cross section all along its length.

Cross section: A cross section is the shape made by cutting straight across an object.

Net: A pattern that you can cut and fold to make a model of a solid shape.

Area: The size of a surface.

Surface Area: The total area of the surface of a three-dimensional object.

Volume: The amount of 3-dimensional space something takes up.