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Caption=What angles does a chord ÀÂ, equal~~to the radius of the circle, forms with ~~a tangent to this circle at point À?
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Caption=1. Moving the point À, explore a value of~~    the angle ÂÀÑ.~~2. Will a degree measure of the angle BAC~~    change if the radius differs.~~3. Conclude and prove the obtained result.
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Caption=1. Given a circle. Construct a chord~~    of the given length. Create and ~~    save a macros of the construction.~~2. Create and save a macros of~~    the construction of a tangent to~~    a circle through a point of the circle.~~3. Make your own drawing and solve this~~    problem.
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