Visualising Solid Shapes Test

Result

Visualising Solid Shapes Test - 1

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Question 1
1 / -0

Which among the following is NOT a polyhedron?

A
A brick

B
A spinning top

C
An unsharped pencil

D
A Rubik's cube

Solution

Brick, Rubik's cube and unsharped pencil are polyhedrons. Whereas, a spinning top is conical in shape, therefore, it is not a polyhedron.
Question 2
1 / -0

If the numbers of vertices and edges of a shape are 16 and 18, respectively, then using Euler's formula, find out the number of faces of the shape.

A
4

B
5

C
6

D
7

Solution

According to Euler's formula: F + V = E + 2
where
F = Number of faces
V = Number of vertices = 16
E = Number of edges = 18
So, F + 16 = 18 + 2
F = 20 - 16 = 4
So, the shape has 4 faces.