A tetrahedron is a three-dimensional shape that has 4 triangular faces. Among the triangle in a tetrahedron is taken into consideration as the base and also the other three triangles together kind the pyramid.The tetrahedron is among the varieties of pyramid, i m sorry is a polyhedron withtriangular deals with connecting the basic to a commonpoint and also a flat polygon base. A tetrahedron has actually a triangular base, thus is likewise referred to together triangular pyramid.

You are watching: How many vertices does a tetrahedron have

1.Tetrahedron Definition
2.Net the a Tetrahedron
3.Tetrahedron Properties
5.Surface Area the Tetrahedron
6.Volume that Tetrahedron
7. Solved examples on Tetrahedron
8.Practice questions on Tetrahedron
9.FAQs top top Tetrahedron

A tetrahedron is a polyhedron v 4 faces, 6 edges, and 4 vertices, in which every the deals with are triangles. The is likewise known as a triangular pyramid whose basic is also a triangle.A consistent tetrahedron has actually equilateral triangles, therefore, every its internal angles measure up 60°. The interior angles of a tetrahedron in each plane add up come 180° as theyare triangular.


In geometry, a net can be characterized as a two-dimensional form which once folded in a details manner produce a three-dimensional shape. A tetrahedron is a 3D shape that deserve to be created using a geometric net. Take a sheet of paper. Observe the two unique nets that a tetrahedron shown below. Copy this ~ above thesheet that paper. Cut it follow me the border and also fold it together directed in the figure. The folded document forms atetrahedron.


A tetrahedron is a three-dimensional shape that is identified by some distinctive properties. The number given listed below shows the face, edge, and vertex the a tetrahedron.


The following points display the nature of a tetrahedron which aid us identify the form easily.

It has actually 4 faces, 6 edges, and 4 vertices (corners).Unlike other platonic solids, a tetrahedron has no parallel faces.

The adhering to table lists the necessary formulas regarded a tetrahedron. Take into consideration a constant tetrahedron made of equilateral triangles v side 's' for the following formulas.

Total surface Area\(\textTSA=\sqrt3 \:s^2 \)
Area the one face\(\textArea that a challenge =\frac \sqrt34s^2 \)
Slant height 'l' that a Tetrahedron\(\textSlant height=\frac \sqrt32s\)
Altitude 'h' of a Tetrahedron\(\textAltitude=\frac s\sqrt63\)

The surface area of a tetrahedron is defined as the complete area or an ar covered by all the faces of the shape. The surface area that a tetrahedron isexpressed in square units, favor m2, cm2, in2, ft2, yd2, etc. A tetrahedron can have two species of surface ar areas,

Lateral surface ar Area the TetrahedronTotal surface ar Area of Tetrahedron

Lateral surface Area that a Tetrahedron

The lateral surface area of a tetrahedron is defined as the surface ar area the the lateral or the slant faces of a tetrahedron. The formula to calculate the lateral surface area of a constant tetrahedron is offered as,LSA of consistent Tetrahedron = sum of 3 congruent it is provided triangles(i.e. Lateral faces)LSA of regular Tetrahedron =3 ∙ (√3)/4 a2square unitswhere a is the side size of a regular tetrahedron.

Total surface ar Area the a Tetrahedron

The complete surface area of a tetrahedron is characterized as the surface area of every the faces of a tetrahedron. The formula to calculate the full surface area that a regular tetrahedron is given as,TSA of continuous Tetrahedron = sum of 4congruent equilateral triangles(i.e. Lateral faces)TSA of continuous Tetrahedron = 4∙ (√3)/4 a2= √3 a2square unitswhere a is the side length of the regular tetrahedron.

The volume of a tetrahedron is defined as the total space occupied by a tetrahedron in a three-dimensional plane. The formula to calculate the volume that a regular tetrahedron is provided as,Volume of constant Tetrahedron =(1/3) × area of the basic × height = (1/3) ∙ (√3)/4 ∙ a2× (√2)/(√3) aVolume of regular Tetrahedron= (√2/12) a3cubic units.where, a is the side length of the consistent tetrahedron.

Topics regarded Tetrahedron

Check the end these interesting write-ups related to the tetrahedron.

Important Notes:The 5 platonic solids have the right to be detailed as tetrahedron, cube, octahedron, icosahedron, and also dodecahedron.A tetrahedron is a triangular pyramid and all 4 faces of a tetrahedronare triangles.A tetrahedron has actually 4 faces, 6 edges, and 4 corners.

Example 1:Two congruent tetrahedrons are stuck with each other along their base to form a triangle bipyramid. How plenty of faces, edges, and also vertices does this bipyramid have?


If we open the triangle bipyramid in bespeak to see its net, it will be comparable to what is shown in the complying with figure:

This mirrors that the triangular bipyramid has actually 6 triangular faces, 9 edges, and also 5 vertices.

Example 2:Find the volume that a continual tetrahedron v a side size measuring5 units. (Round turn off the answer come 2 decimal places)


We know that thevolume that a tetrahedron is:

Volume\(\beginalign= \fracs^36\sqrt2\endalign\), whereby s = next length.

Substituting 's' as 5 us get:

\<\beginalign\textVolume &= \frac5^36\sqrt2 \\\\&=\frac1258.485 \\\\&\approx 14.73\endalign\>Therefore, the volume that the tetrahedron is 14.73 cubic units.

Example 3:Each edge of a constant tetrahedron is 6 units. Find its complete surface area.


The full surface area that a regular tetrahedron is:

Total surface ar Area = \(\sqrt3 \:s^2 \)Substituting 's' = 6, we get:

\<\beginalign\textTotal surface ar Area &= \sqrt3\times\:6^2 \\\\&= \sqrt3 \times 6 \times 6\\&= 62.35\endalign\>Therefore, the full surface area the the tetrahedron = 62.35 square units.

See more: How Many Inches Is A Big Forehead ? What Length Is Considered A Big Forehead

Show answer >

go come slidego to slidego come slide

Great finding out in high college using straightforward cues
Indulging in rote learning, you are most likely to forget concepts. With bsci-ch.org, you will discover visually and be surprised through the outcomes.