Angles index

Shapes and angles

index --- angles --- right angle --- boat --- torch --- shape --- tree --- cannon --- logo

You can select a shape, or a number of sides, and watch the shape being drawn. Or you can select an angle, internal or external, and see if you can guess what sort of shape it will make. The internal angle is the angle inside the shape, between two sides. The external angle is the angle you must turn through if you are travelling down one side, then turn onto the next.

For a more detailed explanation, click here


Number of sides:

Internal angle:

External angle:

See also Tessellations (how shapes fit together on the flat)
Solids (how to make solid shapes from flat ones)
Other websites Regular polygons (Wikipedia)
Regular polygons (Mathworld)
Star polygons (Wikipedia)
Star polygons (Mathworld)