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Question
______ and ______ are the capital letters of English alphabets that have one line of symmetry but they interchange to each other when rotated through 180°.
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Solution
M and W are the capital letters of English alphabets that have one line of symmetry but they interchange to each other when rotated through 180°.
Explanation:

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| Shape | Centre of Rotation | Order of Rotation | Angle of Rotation |
| Square | |||
| Rectangle | |||
| Rhombus | |||
| Equilateral Triangle | |||
| Regular Hexagon | |||
| Circle | |||
| Semi-circle |
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