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Standard VIII
Mathematics
Faces, Edges and Vertices
If a solid sh...
Question
If a solid shape has
12
faces and
20
vertices, then the number of edges in this solid is _____.
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Solution
Euler's Formula for any polyhedron is
F
+
V
−
E
=
2
.
Where,
F
=
Faces and
V
=
Vertices and
E
=
Edges.
Given:
F
=
12
,
V
=
20
To Find: Number of edges,
E
Now, by using the above formula,
12
+
20
−
E
=
2
⇒
32
−
E
=
2
⇒
E
=
30
So, if a solid shape has
12
faces and
20
vertices, then the number of edges in this solid is
30
.
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