# Surface Area of a Triangular Pyramid Calculator

A pyramid with the triangular base is known as triangular pyramid which consists of three faces, six edges and four vertices. It is also called as tetrahedron. All the faces of the polyhedron meet at a common point called as apex. SA of the pyramid is the area of the surfaces of all three triangle faces and the triangular base. Use our online surface area of a triangular pyramid calculator to find SA by providing the apothem length, length of side and slant height.

A pyramid with the triangular base is known as triangular pyramid which consists of three faces, six edges and four vertices. It is also called as tetrahedron. All the faces of the polyhedron meet at a common point called as apex. SA of the pyramid is the area of the surfaces of all three triangle faces and the triangular base. Use our online surface area of a triangular pyramid calculator to find SA by providing the apothem length, length of side and slant height.

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### Example:

A triangular pyramid having a apothem length of 9 cm, side length of 8 cm and slant height of 7 cm.

#### Solution:

Surface Area (SA) = ((ab) + (3bl)) / 2

= ((9 x 8) + (3 x 9 x 7)) / 2

= 120 cm^{2}