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27 questions all stuffed in to the same circle gives students a real challenge. This puzzle is great for any high school geometry lesson on circles. It contains angles with their vertex in the circle, on the circle, and outside of the circle. These angles are all made using diameters, chords, secants and tangents.

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Have students take a picture of a parabola, then use geometer's sketch pad to put it on a graph and determine the equation.

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