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Using Fig. 6.1, which one of the following pairs is always similar? 
AAny two circles
BA circle and a square
CA triangle and a square
DAny two quadrilaterals
Answer & Solution
Correct answer: A. Any two circles
All circles are similar because every circle has the same shape; only the radius may differ. A circle and a square, or a triangle and a square, do not have the same shape. Also, not every pair of quadrilaterals is similar.
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