Hint: Use the Pythagorean Theorem (Click the circle at left to view slope triangle.)
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b. Reflect AB across the y-axis to create A′B′. What type of shape is ABB′A′ if the points are connected in order? Then find the area of ABB′A′.
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Answer: (Click the circle at left to view.)
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Shape: (Click the circle at left to view.)
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