A triangular prism is a polyhedron, (three-dimensional shape) consisted of of 2 triangular bases and also three rectangle-shaped sides. Like other Prisms, the 2 bases right here are parallel and congruent to every other. It has 5 faces, 6 vertices and also 9 edge in total.

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Triangular Prism is a pentahedron and has nine unique nets. The edges and vertices the the bases are joined through each various other via three rectangular sides.

Facts:Number of encounters = 5Number of edge = 9Number of vertices = 6Shape of the base = TriangularShape of sides = RectangularSurface Area = 2(Area of triangular bases)+Perimeter of base x height of prismVolume = Area of base x elevation of Prism

The sides of triangle prism, i beg your pardon are rectangular in form are joint through each other side by side. All cross-sections parallel to the base deals with are the same as a triangle. A triangular pyramid has 4 triangular bases uneven the triangle prism, joined with each other and also all are congruent to every other.

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In geometry, a triangular prism is a kind of prism with three sides and two bases. The sides room of rectangle shape and also bases are of triangle shape. Altogether, that has five faces, ripe vertices and six edges. 

The sides and also bases that the triangle prism space congruent or else oblique. The edge of the prism sign up with the corresponding sides. The 2 bases that this prism space equilateral triangles and edges of this triangles space parallel to each other. Check out the listed below figure to understand the structure.


Other species of Prisms

Right triangular Prism

A appropriate triangular prism has its three rectangle-shaped sides congruent. Also, the two triangular bases are parallel and congruent to each other. The rectangle-shaped or lateral encounters are perpendicular come the triangular bases.


The volume that a triangle prism is equal to the product the the triangular basic area and also the height of the prism.

Volume = Area that the base × height of prism

Since, the base is in triangular shape, therefore,

Area = ½ b h


Volume of triangle Prism = ½ × b × h × l

Where b is the basic length, h is the elevation of the triangle and also l is the length between the triangle bases.

Surface Area

Surface area of triangle prism is equal to the sum of the lateral surface ar area and also twice the basic area that the triangular prism. It is measure in square units.

Surface area of triangular prism = 2A + PH


A is the area of the triangle bases, P is the perimeter of the bases and H is the height of the prism

Now, Area the the triangle base= ½ × b × h

If a, b and also c space the political parties of the triangular bases, then,

Perimeter of the base = a + b + c


Surface area of triangular prism = 2(½ × b × h) + ( a + b + c)H

Surface Area that the triangle Prism = (bh + ( a + b + c)H)

Where b and also h is the base and also height of the bases, respectively and H is the elevation of the prism.


Let us discuss some the the nature of the triangular prism.

It has a full of 9 edges, 5 faces, and also 6 vertices(which room joined through the rectangular faces).It has actually two triangle bases and three rectangular sides.If the triangular bases are equilateral and the other faces are squares, instead of a rectangle, climate the triangular prism is claimed to it is in semiregular.

Triangular Prism Net

If we open up each challenge of the triangle prism, we will get the net. The net of this prism comprises 3 rectangles and also two triangles. In the below figure you can see the nine unique nets.


Solved Examples

Example 1: discover the volume of the triangular prism through base is 5 cm, elevation is 10 cm, and length is 15 cm.

Solution: Volume of triangular Prism = ½ × b × h × l

V = ½ × 5 × 10 × 15

Volume, V = 375 cm3

Example 2: If the elevation of the prism is 4cm and the size of the next of the it is provided triangular basic is 6cm. Then uncover the area that the prism for the above example.

Solutions: We have,

Base = 5cm, elevation of the base= 10cm, size of the base=15cm, height of the prism = 4cm

As the base is an it is provided triangle, because of this all that sides will be equal.

Hence, a = b = c = 6cm.

By the formula,

Area the the triangular Prism = (bh + ( a + b + c)H)

Area = (5 × 10+(6+6+6)4)

=(50 + (18)4) = 50 + 72

= 122 cm2

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A triangular prism is polyhedron and a three-dimensional shape that has actually 5 faces, 6 edges and also 9 vertices. Its bases room triangular and sides room rectangular.