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# All about Same Base, Same Parallels in Geometry

### All about Same Base, Same Parallels in Geometry

In geometry, the same base, same parallels theorem states that if two figures have the same base and are parallel to each other, then they are congruent. This theorem can be applied to a variety of shapes and figures, which makes it a handy tool to have in your geometric toolkit. Let's take a closer look at how this theorem works.

### How to Use the Same Base, Same Parallels Theorem

As the name suggests, the same base, same parallels theorem can be used when two figures have the same base and are parallel to each other. To use the theorem, simply inspect the two figures in question and determine whether or not they meet those criteria. If they do, then you can conclude that the figures are congruent.

It's important to note that the same base, same parallels theorem only applies to figures that have four sides and four vertices (i.e. quadrilaterals). This means that you can't use the theorem to compare a square and a rectangle, for example, since they don't have the same number of sides. However, you can use the theorem to compare two squares or two rectangles, as long as they have the same base.

The next time you're stuck trying to figure out if two shapes are congruent or not, remember the same base, same parallels theorem! This handy little theorem can be applied to a variety of shapes and figures, as long as they meet the necessary criteria. So pull out your geometry textbook and brush up on this essential skill—you never know when you'll need it!