Cuboid
Definition Of Cuboid
Cuboid is a polyhedron with six rectangular plane faces.
More About Cuboid
There are 12 edges and 8 vertices in a cuboid.
Cuboid is also called as right rectangular prism or rectangular parallelepiped box.
If all the edges of a cuboid are equal then it forms a cube.
In a cuboid opposite faces are equal and parallel and all angles are right angles.
Formulas for the above rectangular box:
Volume = lwh
Lateral Surface Area = 2lh + 2wh
Surface Area = 2lw + 2lh + 2wh
Video Examples: Surface Area of a Cuboid - Mathematics
Example of Cuboid
The above figure is a rectangular prism having six rectangular faces with the opposite faces being parallel.
Solved Example on Cuboid
Ques: Which net can be folded to form a cuboid?
Choices:
A. Figure 1
B. Figure 2
C. Figure 3
D. Figure 4
Correct Answer: C
Solution:
Step 1: A cuboid is a polyhedron with six rectangular plane faces.
Step 2: Observe the nets given in the four figures. [Cut a paper into the shape of net and fold it.]
Step 3: We observe that a cuboid is formed only from the net in Figure 3.
Step 4: The net in the Figure 3 can be folded to form a cuboid.