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7.5 Identifying a Trapezoid in the Coordinate Plane

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Points A and B are movable in the Applet below.

Show that ORST is a trapezoid. Then decide whether it is isosceles.
Step 1: Compare the slopes of opposite sides by moving points A and B to create parallel lines.

Is ORST a trapezoid?

Step 2: Compare the lengths of legs and by using the "Distance" button under the "Tools" option in the Applet.

Is ORST isosceles?