formula of surface area of triangle
There is no formula for the surface area of a triangle as a triangle is a two-dimensional shape and does not have a surface area. However, if you are referring to the surface area of a triangular pyramid or cone, the formula would depend on the dimensions and shape of the base. For example, the surface area of a regular triangular pyramid is given by:
S = (a^2√3)/4 + 3al/2
Where "a" is the length of one side of the base, and "l" is the slant height (the height of each triangular face).