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A 3-dimensional object (NOT figure) is measurement in Cubic Units).
Its surface area is measuremd in Square Units.
For example if we use an house brick . Its dimensions may be 9inches, x 4 inches, x 3 inches.
Its volume is 9 ins X 4 ins X 3 ins. = 108 cu.ins. (Cubic Inches).
Its surface are will have 6 faces. ; 2 @ (9 x 4) 2 @ ( 4 x 3 ) and 2 @ (9 x 3)
So its surface area is 2(36 sq.ins) + 2(12sq. ins) + 2(27sq.ins) =
72 + 24 + 54 = 150 sq. ins. ( square inches).
NB A 3-dimensional is an OBJECT
A 2-dimensional us a FIGURE .
A 1-dimensional is a LINE
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Why are square units used when working with a three-dimensional figure?
Surface area of three dimensional figures are measured in square units whereas their volumes are measured in cubic units
When measuring the amount of space in a three-dimensional figure you are finding what?
Its volume measured in cubic units.
Why is a solid figure measured in cubic units?
The length, width, or height of a solid figure is measured in units of length. The area of the figure's outside surfaces is measured in squared units of length. The volume of space filled by the figure is measured in cubed units of length. The mass of the figure is measured in units of mass. The weight of the object is measured in units of force. The age of the figure is measured in units of time. etc.
How to figure out the area of a sphere?
Surface area of a sphere = 4*pi*radius2 and measured in square units
What volume of rectangle objects?
A rectangle does not have volume because it is 2 dimensional but it does have area which is length times width measured in square units.
