Area of a triangle

Is there a function to find area of triangle,not by using Heron's algorithm.

Answer 1

[Dr. Seis]

How about polyarea?

>> x = [0, 0, 4];
>> y = [0, 3, 0];
>> area1 = polyarea(x,y)

area1 =

     6

>> area2 = 0.5*3*4

area2 =

     6

[Luffy]

But how do you find area of a triangle in 3-D,the above command only gives 2D area

[Walter Roberson]

Triangles only _have_ 2D area.

Perhaps you are asking about finding the area of a triangle when the coordinates are specified in 3D ?

[Luffy]

My mistake in writing 2D area, i meant what if u have coordinates in 3D.

Example:- area of triangle with coordinates as (1,0,0)(0,1,0)(0,0,1) without using heron's algorithm

[Dr. Seis]

I think you would have to do some sort of coordinate transform (to still use the "polyarea" function above), such that all the coordinate values for one of the dimensions (e.g., the z-coordinate) are 0. But it seems using Heron's algorithm would be much easier.

[SaN AruL]

thank you Dr. Seis..........

Answer 2

[AYUSH MISHRA]

function area=tri_area(b,h,n)
    area=0.5*b*h*n;
end
%Here b=base of triangle ,  h=height of triangle ,  n=number of triangle

Example

area= tri_area(2,3,5)

area =

15