Consider the rectangular region with the following points as vertices: (5,4), (-5,4), (-5,-4), (5,-4). How many points with integer coordinates will be strictly in the interior of this rectangular region?
On a piece of graph paper, plot the four corner points of the rectangle.
Connect the corner points to draw the rectangle.
Count the number of points inside the rectangle.
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How many points with integer coordinates will be strictly in the interior of this rectangular region?
What does "strictly" in the interior mean? Does it mean that points lying on the lines are not to be counted?
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