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Order of rotational symmetry of a semi c...

Order of rotational symmetry of a semi circle is two.

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NCERT EXEMPLAR-PRACTICAL GEOMETRY SYMMETRY AND VISUALISING SOLID SHAPES-EXERCISE
  1. An isosceles trapezium has one line of symmetry.

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  2. Order of rotational symmetry of a rhombus is four.

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  3. Order of rotational symmetry of a semi circle is two.

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  4. True or False: In oblique sketch of the solid, the measurements are ke...

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  5. True of False: An isometric sketch does not have proportional length.

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  6. Write (T) for True and (F) for false: (i) A Cylinder has no vertex.

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  7. All the faces, except the base of a square pyramid are triangular. sta...

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  8. A pyramid has only one vertex. state true or false

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  9. A triangular prism has 5 faces, 9 edges and 6 vertices. state true or ...

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  10. If the base of a pyramid is a square, it is called a square pyramid. ...

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  11. A rectangular pyramid has 5 rectangular faces. state true or false

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  12. Rectangular prism and cuboid refer to the same solid.

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  13. A tetrahedron has 3 triangular faces and 1 rectangular face.

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  14. State True or False While rectangle is a 2 -D figure , cuboid is a ...

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  15. State True or False: While sphere is a 2-D figure, circle is a 3-D f...

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  16. State True or False Two dimensional figures are also called plane fi...

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  17. A cone is a polyhedron.

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  18. A prism has four bases.

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  19. The number of lines of symmetry of a regular polygon is equal to the v...

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  20. State whether the given statement is True or False: The order of rotat...

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