Give three examples from your environment of:

(i) Points
(ii) Portion of a line
(iii) Plane surface
(iv) Portion of a plane
(v) Curved surfaces

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Solution

(i) Three examples of points are:
The period at the end of a sentence, a pinhole on a map and the point at which two walls and the floor meet at the corner of the room

(ii) Three examples of portion of a line are:
Tightly stretched power cables, laser beams and thin curtain rods

(iii) Three examples of plane of a surface are:
The surface of a smooth wall, the surface of the top of a table and the surface of a smooth white board

(iv) Three examples of portion of a plane are:
The surface of a sheet of a paper, the surface of a calm water in a swimming pool and the surface of a mirror

(v) Three examples of curved surfaces are:
The surface of a gas cylinder, the surface of a tea pot and the surface of an ink pot

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Similar questions

Select the correct alternative:

(a) The inter-molecular force is maximum in :

(i) solids (ii) gases

(iii) liquids (iv) none of the above.

(b) The inter-molecular space is maximum in :

(i) liquids (ii) solids

(iii) gases (iv) none of the above.

(i) gases (ii) liquids

(iii) solids (iv) none of the above

(d) The molecules move only within the boundary of :

(i) liquids (ii) gases

(iii) solids (iv) none of the above

(e) The temperature at which a liquid gets converted into its vapour state is called its :

(i) melting point (ii) boiling point

(iii) dew point (iv) freezing point

(f) Rapid conversion of water into steam is are an example of:

(i) evaporation (ii) freezing

(ii) melting (iv) vaporization

(g) Evaporation takes place from the :

(i) surface of liquid

(ii) throughout the liquid

(iii) mid-portion of the liquid

(iv) bottom of the liquid

(h) Boiling takes place from:

(i) the surface of the liquid

(ii) throughout the liquid

(iii) mid-portion of liquid

(iv) none of the above

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