What is the Unit Circle? Angle Measure in Degree

The unit circle is a circle with radius 1, centered at the origin of a coordinate plane. It is a fundamental geometric and mathematical concept used in various fields. In this video I cover what the angle measures are. The first angles are 30 degrees, then 45 degrees. Using these two families of angles you can cover the angles in the Unit Circle.
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[@Dkriedt]

Why does she start out with 90 * at top, north?

[@MooMooMath]

Sorry if that was confusing. I probably should have said," let's focus on three families of angles, 90, 30, and 45 degrees. " By starting at 90 degrees I was hoping to show some anchor angles and then fill in the other angles.