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How many of the following 8 shapes must have (at least) one axis of symmetry?
equilateral triangle,right triangle,square,cyclic quadrilateral,parallelogram,rhombus,rectangle,regular pentagon\begin{array}{c}&&\text{equilateral triangle}, &\text{right triangle}, &\text{square}, &\text{cyclic quadrilateral}, \\ &\mbox{parallelogram}, &\text{rhombus}, &\text{rectangle}, &\text{regular pentagon} \end{array} parallelogram,equilateral triangle,rhombus,right triangle,rectangle,square,regular pentagoncyclic quadrilateral,
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