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Regular octahedron has 8 congruent faces...

Regular octahedron has 8 congruent faces which are isosceles triangles

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NCERT EXEMPLAR-VISUALISING SOLID SHAPES -EXERCISE
  1. A polyhedron can have 3 faces.

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  2. State whether the following statements are True or False. A polyhedro...

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  3. Regular octahedron has 8 congruent faces which are isosceles triangles

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  4. Pentagonal prism has 5 pentagons.

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  5. Every cylinder has 2 opposite faces as congruent circles, so it is als...

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  6. Euler’s formula is true for all three-dimensional shapes.

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  7. A polyhedron can have 10 faces, 20 edges and 15 vertices.

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  8. True (T) or false (F) The top view of

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  9. The number of edges in a parallelogram is 4. (True/False)

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  10. Every solid shape has a unique net.

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  11. Pyramids do not have a diagonal.

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  12. The given shape is a cylinder.

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  13. A cuboid has atleast 4 diagonals. (True/False)

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  14. All cubes are prisms.

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  15. A cylinder is a 3-D shape having two circular faces of different radii...

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  16. On the basis of the given figure, the length of a rectangle in the net...

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  17. If a length of 100 m is represented on a map by 1 cm, then the actual ...

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  18. The model of a ship shown is of height 3.5 cm. The actual height of th...

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  19. The actual width of a store room is 280 cm. If the scale chosen to mak...

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  20. How many faces does each of the following solids, have? Tetrahedro...

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