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On the coordinate plane shown, each grid unit represents 10 feet. Polygon QRST has vertices Q(10, 30), R(−20, 30), S(−20, −10), and T(10, −10), and represents the floor plan of a room. Find the perimeter and area of the room.

On the coordinate plane shown, each grid unit represents 10 feet. Polygon QRST has-example-1
User Amleszk
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User David Driscoll
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