Vocabulary - shapes

In the IELTS listening you sometimes have to listen to a description of a diagram and either
a) label the diagram using words from the listening
b) match options in a box to parts of the diagram
c) match parts of the diagram to descriptions

The diagram could be a map or plan and later we will look at vocabulary useful for these. But sometimes the diagram is of an object,  often something like this:

To know which part of the object is being described it's important your vocabulary includes all of the basic shapes.  Here is a list of basic shapes - make sure you are familiar with both the nouns and their adjectives: