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Question

If 
a = Number of vertices of a tetrahedron
b = Number of edges of a tetrahedron
c = Number of faces of a tetrahedron
Then the value of a+b+c is 


A
14
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B
16
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C
10
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D
12
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Solution

The correct option is A 14
A tetrahedron is formed by the help of four planes as you can see in the figures .

A tetrahedron is composed of four triangular faces, six straight edges and four vertex corners
 a+b+c = 4+6+4 = 14

Mathematics

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