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_______and ____________are the capital letter of English alphabets that have one line of symmetry but they interchange to each other when rotated through `180^(@)`.

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NCERT EXEMPLAR-PRACTICAL GEOMETRY SYMMETRY AND VISUALISING SOLID SHAPES-EXERCISE
  1. triangle is a figure that has a line of symmetry but lacks rotational ...

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  2. is a figure that has neither a line of symmetry nor a rotational symme...

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  3. and are the capital letter of English alphabets that have one line of ...

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  4. The common portion of two adjacent faces of a cuboid is called .

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  5. A plane surface of a solid enclosed by edges is called.

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  6. The corners of solid shapes are called its.

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  7. A solid with no vertex is .

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  8. A triangular prism hasfaces, edges and vertices.

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  9. A triangular pyramid has faces, edges and vertices.

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  10. A square pyramid hasfaces,edges and vertices.

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  11. Fill in the blanks:- Out of faces of a triangular prism,are rectangles...

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  12. The base of a triangular pyramid is a .

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  13. Out of faces of a square pyramid, are triangles and is/are squares.

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  14. Out of faces of a rectangular pyramid are triangles and base is .

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  15. Each of the letters H,N,S and Z has a rotational symmetry of order .

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  16. Order of rotational symmetry of a rectangle is .

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  17. Order of rotational symmetry of a circle is .

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  18. Each face of a cuboid is a .

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  19. Line of symmetry for an angle is its .

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  20. A parallelogram has line of symmetry.

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