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Faces, Edges and Vertices

A tetrahedron...

Question

A tetrahedron has ____ faces.

A

4

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B

6

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C

7

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D

9

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Solution

The correct option is A
4

A tetrahedron is a triangular pyramid that is composed of 4 triangular faces, 6 straight edges, and 6 vertices. Take a look at the following image of a tetrahedron:

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Q. Number of faces in a tetrahedron are

Q. An tetrahedron has 4 faces and 6 edges. How many vertices does it have?

A polyhedron has 9 vertices, 6 faces and 12 edges.

State true or false:

A tetrahedron is a polyhedron that has four vertices and four faces.

Q. A tetrahedron

(T_{1})

has a fixed volume,

V_{1}

. Another tetrahedron

(T_{2})

V_{2}

is drawn by joining the centroids of the faces of

T_{1} .

V_{1} = k V_{2},

then the value of

k

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