Two Inscribed Angles Intercepting the same Arc

Drag points A, B, C and D around the circle to see how the Red Inscribed Angle (angle DAC) compares to the Blue Inscribed Angle (angle DBC). Click the check-boxes to show the actual angle measure of each. [b] Question: [/b]What do these angles have in common? how do the angle measures of these inscribed angles compare?

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