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Geometry

Here is link to  IXL's website Geometry.

Here is a video on ACT circles.  It is about 16 minutes in length.

Here is a video that will make the Pythagorean theorem make sense!  Watch 

Here is a video on how to find vertical, horizontal, and oblique asympote(s).

Here is a video to explain horizontal asympote(s).  It is less than 5 minutes.

Here is a video that is specific to the properties of triangles.

Here is a link that goes over Unit Circle.