What is the amount of surface enclosed by a closed plane figure called?
${\text{A}}{\text{.}}$ area
${\text{B}}{\text{.}}$ perimeter
${\text{C}}{\text{.}}$ volume
${\text{D}}{\text{.}}$ none of the above
Last updated date: 25th Mar 2023
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Answer
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Hint- Here, we will be proceeding by understanding that actually a closed plane figure means a two dimensional figure and then defining all the terms mentioned in the options.
Any plane figure means that the figure is a two dimensional figure in x-y or y-z or x-z plane i.e., the third coordinate is always zero.
For example: In the above figures, the rectangle is a closed plane figure (two dimensional figure) whose z coordinate is zero (only x and y coordinates exist) whereas the cube in the other figure is a closed three dimensional figure.
Area refers to the amount of surface enclosed by a closed two dimensional figure. So, the area is called the amount of surface enclosed by a closed plane figure.
Perimeter refers to the amount of the boundary of any surface enclosed by a closed plane figure or a closed two dimensional figure. So, the perimeter is not called the amount of surface enclosed by a closed plane figure.
Volume refers to the three dimensional space enclosed by a boundary or occupied by an object. So, volume is not called the amount of surface enclosed by a closed plane figure.
So, for the rectangle given in the figure area and perimeter exists whereas volume doesn’t exist and for the cube given, volume exists.
Clearly, option A is correct.
Note- In these types of problems, we know that area and perimeter are always associated with a closed two-dimensional figure or closed plane figure whereas volume is always associated with a closed three dimensional space which is enclosed by a boundary or by an object.


Any plane figure means that the figure is a two dimensional figure in x-y or y-z or x-z plane i.e., the third coordinate is always zero.
For example: In the above figures, the rectangle is a closed plane figure (two dimensional figure) whose z coordinate is zero (only x and y coordinates exist) whereas the cube in the other figure is a closed three dimensional figure.
Area refers to the amount of surface enclosed by a closed two dimensional figure. So, the area is called the amount of surface enclosed by a closed plane figure.
Perimeter refers to the amount of the boundary of any surface enclosed by a closed plane figure or a closed two dimensional figure. So, the perimeter is not called the amount of surface enclosed by a closed plane figure.
Volume refers to the three dimensional space enclosed by a boundary or occupied by an object. So, volume is not called the amount of surface enclosed by a closed plane figure.
So, for the rectangle given in the figure area and perimeter exists whereas volume doesn’t exist and for the cube given, volume exists.
Clearly, option A is correct.
Note- In these types of problems, we know that area and perimeter are always associated with a closed two-dimensional figure or closed plane figure whereas volume is always associated with a closed three dimensional space which is enclosed by a boundary or by an object.
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