A triangular pyramid is a geometric form that has a triangular base and also three triangle faces. It has a vertex, usual to every the 3 lateral deals with of a triangular pyramid. If every the three triangular deals with are equilateral, then such a pyramid is referred to as a tetrahedron.

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A Pyramid is a polyhedron that has a base and three or more than 3 triangular deals with that meeting at a point over the base (the apex). Triangular pyramids space formed solely from triangles. The 3 triangular political parties slant upwards to form the triangular base. As it is created from four triangles, a triangular-based pyramid is likewise called a tetrahedron. Learn more about pyramids here.

The base of the pyramid can be based upon different species of triangles. If all the faces are equilateral triangle or triangles who edges space all equal lengths, the pyramid is dubbed a continual tetrahedron. If the triangles have actually edges of various lengths, the pyramid is an rarely often rare tetrahedron.


Triangular Pyramid Definition

A triangular pyramid is a pyramid which has actually a triangle base. In geometry, vertices are basically corners. All triangular-based pyramids, either regular or irregular, have four vertices.

Triangular-based pyramids have actually 6 edges, 3 are along the base and 3 are expanding up native the base. If the six edges room of the same length, all the triangles are equilateral, and the pyramid is dubbed a continual tetrahedron.


Types of triangular Pyramids

The different varieties of triangle pyramids room :

Regular triangle PyramidNon-regular PyramidRight triangle Pyramid

Regular triangular Pyramid

A pyramid has a base through sides that room equal in length. For the triangular pyramid, the basic of continual tetrahedron must be an it is provided triangle.

Non-Regular triangle Pyramid

A pyramid has actually a base v sides that have different lengths. The base of the triangle pyramid has unequal sides. Or we deserve to say, the base could be a scalene triangle or an isosceles triangle.

Right triangular Pyramid

A three-Dimensional shape with a right-angle triangle at its base extruding as much as a single point is a right-triangular pyramid.

Properties of triangle Pyramid

The triangular pyramid has 4 facesThe 3 side deals with of the triangular pyramid are trianglesThe base is likewise triangular in shapeIt has actually 4 vertices (corner points)It has 6 edgesTriangular pyramid have the right to be regular, irregular and also right-angledA continuous triangular pyramid has equilateral triangles because that all four faces

Triangular Pyramid Formula

The formula because that the area and volume that the triangular pyramid is provided here. We can use these formulas to solve the problems based upon them.

Volume of triangular Pyramid

To uncover the volume of a triangular-based pyramid, multiply the area the the triangular base and also the height of the pyramid (measured from the basic to the apex). Then, division this number by three.

Volume = ⅓ × basic Area × Height

Surface Area of triangular Pyramid

To determine the surface ar area the a triangular-based pyramid, include together the area of the base and also the area of all the sides.

For continuous tetrahedra, this calculate is simple. Discover the size of the base and the elevation of one of the triangles. Multiply those dimensions collectively and also divide this number through two. This is the area of one of the triangles.

Now, main point this area by four to account for all the triangular deals with of the pyramid. For irregular tetrahedra, uncover the area that every triangle individually, utilizing the area formula. Then, include all the locations together.

Surface Area = (Base area) + ½ × Perimeter × (Slant length)

Net the a triangle Pyramid

A network of the triangular pyramid is the pattern developed when the surface ar of the is to adjust out level showing every triangular confront of the figure. For different varieties of solids, the net pattern is different.

To discover the net of a hard we should keep a note of the adhering to points:

Make sure the pyramid and the net have actually an equal number of faces.The shapes of the deals with of the pyramid should match the forms of the matching faces in the net.Imagine how the net deserve to be urgently to type the pyramid and also assure that all the political parties fit with each other properly.


Note: Nets are beneficial when we require to discover the surface area that the solids.

Triangular Pyramid addressed Examples

Example 1: find the surface ar area that a triangular pyramid v the basic area is 28cm.sq., the perimeter is 20cm, slant length is 5cm.


Surface area = + ½ × Perimeter × = 28 + ½ × 20 × 5

= 28 + 50

= 78 cm.sq.

Example 2: discover the volume that a triangular pyramid with a basic area is 28cm, height is 4.5cm.


Volume = ⅓ × base Area × Height

= ⅓ × 28 × 4.5

= ⅓ × 126

= 42 cubic.cm.

Example 3: uncover the volume the the adhering to triangular pyramid, round off your price to 2 decimal places.

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V = ⅓ × AH

= ⅓ × (½ bh) H

= ⅙ bhH

= ⅙ × 19 × 17 × 23

= 1238.17 (Correct come 2 decimal places)

So, the volume is 1238.17 cm3

Practise Questions

What is the volume of a continual triangular pyramid whose edge size is same to 10cm?Find the total surface area that a constant triangular pyramid whose each edge is equal to 5 cm.