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Mathematics 16 Online
OpenStudy (anonymous):

In the diagram below, how does angle ACD change as you move the point of tangency (point D) along the edge of the circle? Hint: Will the angle increase or decrease in size as point D moves along the circle upwards towards the x-axis? What about as D moves downward towards the y-axis? What will happen to the angle? Use the diagram below for help. You must show all work and provide an explanation to receive credit.

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