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The diagram is a circle with a horizontal line above it.The diagram at right shows a flat surface containing a line and a circle with no points in common. Visualize moving the line and/or circle so that they intersect at exactly one point, two points, or three points. Decide if each of these situations is possible and then illustrate the ones that are with examples. .

Use the eTool below to move the circle and/or line to see the points of intersection.
Click the link at right for the full version of the eTool: Int1 1-51 HW eTool.