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

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Triangular Prism is a pentahedron and has nine distinct nets. The edges and vertices the the bases space joined with each various other via three rectangular sides.

Facts:Number of deals with = 5Number of edges = 9Number that vertices = 6Shape of the base = TriangularShape of sides = RectangularSurface Area = 2(Area of triangle bases)+Perimeter of base x height of prismVolume = Area of base x elevation of Prism

The political parties of triangular prism, i m sorry are rectangular in shape are joint with each various other side through side. All cross-sections parallel to the base deals with are the very same as a triangle. A triangular pyramid has 4 triangular bases unlike the triangular prism, joined through each other and all space congruent to every other.

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In geometry, a triangle prism is a type of prism with three sides and also two bases. The sides space of rectangle shape and also bases space of triangle shape. Altogether, the has five faces, nine vertices and also six edges. 

The sides and also bases that the triangular prism space congruent or rather oblique. The edge of the prism sign up with the matching sides. The two bases the this prism space equilateral triangles and also edges of these triangles are parallel to each other. View the below figure to understand the structure.


Other varieties of Prisms

Right triangle Prism

A ideal triangular prism has its three rectangular sides congruent. Also, the 2 triangular bases are parallel and congruent to each other. The rectangle-shaped or lateral faces are perpendicular come the triangle bases.


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

Volume = Area of the basic × height of prism

Since, the basic is in triangular shape, therefore,

Area = ½ b h


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

Where b is the base length, h is the height of the triangle and also l is the length in between the triangle bases.

Surface Area

Surface area of triangle prism is equal to the amount of the lateral surface area and twice the basic area the the triangular prism. The is measure in square units.

Surface area of triangle prism = 2A + PH


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

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

If a, b and c space the sides of the triangle bases, then,

Perimeter that the base = a + b + c


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

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

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


Let us talk about some the the properties of the triangular prism.

It has a total of 9 edges, 5 faces, and also 6 vertices(which space joined through the rectangle-shaped faces).It has actually two triangular bases and three rectangular sides.If the triangle bases are equilateral and also the other encounters are squares, instead of a rectangle, climate the triangle prism is said to be semiregular.

Triangular Prism Net

If we open up each confront of the triangle prism, we will acquire the net. The network of this prism comprises 3 rectangles and also two triangles. In the below figure you deserve to see the nine distinctive nets.


Solved Examples

Example 1: uncover the volume the the triangle prism with base is 5 cm, elevation is 10 cm, and also 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 height of the prism is 4cm and also the size of the next of the equilateral triangular basic is 6cm. Then discover the area that the prism for the above example.

Solutions: We have,

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

As the basic is an equilateral triangle, because of this all that is sides will certainly be equal.

Hence, a = b = c = 6cm.

By the formula,

Area of the triangle 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 triangle prism is polyhedron and a three-dimensional shape that has actually 5 faces, 6 edges and also 9 vertices. That is bases room triangular and sides space rectangular.