What are the formulas for the measure of angles outside of a circle

The video tutorial covers the different types of angles related to circles, including those at the center, on the circle, and outside the circle. It explains the properties of secant and tangent lines and provides formulas for calculating angles formed outside the circle. The tutorial also includes examples to demonstrate the application of these formulas.

How do you calculate the measure of angle A when given arcs DE and BE?

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What happens if you try to find the measure of angle A using the same arc for both tangent lines?

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