Area of a triangle with three points Calculator

Calculates the area and boundary length of a triangle with three points.

 point A (x1 , y1 ) point B (x2 , y2 ) point C (x3 , y3 ) 6dgt10dgt14dgt18dgt22dgt26dgt30dgt34dgt38dgt42dgt46dgt50dgt area S boundary length L
 $\normal Triangle\ surrounded\ with\ three\ points\\\vspace{5}S=\left|{\large\frac{x_1y_2+x_2y_3+x_3y_1-y_1x_2-y_2x_3-y_3x_1}{2}}\right|\\\vspace{5}L=\sqrt{(x_1-x_2)^2+(y_1-y_2)^2}\\\hspace{30}+\sqrt{(x_2-x_3)^2+(y_2-y_3)^2}\\\hspace{30}+\sqrt{(x_3-x_1)^2+(y_3-y_1)^2}\\$

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