geomotry

the quadrilateral named in parts a through d are parallelograms formed on the diagram at the right.give the coordinates for the fourth vertex.then calculate the slopes of the sides to show that the oppisite sides are parallel. how do you do that

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  1. ...find the slope? I'm not sure what you don't understand here. I mean, the vertex coordinates are given on the diagram right? Then it's easy. Just find the slope on each side and if the slope on both sides are the same then that proved they're parallel and thus is a parallelogram.

    In case you don't know this, for two given coordinates (x1, y1) and (x2, y2), where x and y = any real number. To find the slope:

    m = (y2-y1)/(x2-x1)

    Note: it doesn't matter which coordinate you set as coordinate 1 or coordinate 2 as long as you are consistent with your selection.

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  2. How do you find the measures of an interior angle and an exterior angle of polygons?

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