To solve mathematical equations, people often have to work with letters, numbers, symbols and special shapes. In geometry, you may need to explain how to compute a triangle’s area and illustrate the process. You don’t have to draw geometric shapes by hand if you have Microsoft Office. Office applications such as PowerPoint, Word and Excel, have built-in shapes you can add to documents instantly. You can also use an Office app to draw free-form shapes manually using your mouse. Writer Bio