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3. Tick () the correct option in each of the following:(a) Spherical objects havesurface.(i) flat(ii) curved(iii) plane(iv) conical8​

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Answer:

There are 3D shapes that consist of only flat SURFACES. For EXAMPLE, a cube, cuboid, PYRAMID and PRISM are all 3D shapes that are made up of flat surfaces. Their surfaces are squares, rectangles, triangles and parallelograms. None of them has a curved surface. The non-examples of 3D shapes with curved surface are cubes, cuboids, pyramids, prisms, bricks, etc.

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