These pictures show how the the special right triangles correlate with the Unit Circle and how it is derived. The vertices of each of these triangles are on the Unit Circle and in each, it is possible to faintly see how they are depicted on a coordinate plane. The Unit Circle, which has a radius of 1, can help us to find all of its vertices just by knowing the rules of the relationship between side lengths and how different angle measures/arc lengths affect the side lengths.
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