Calculating the area of a triangle is an elementary problem encountered often in many different situations. The best known, and simplest formula is

Where S is area, b is the length of the base of the triangle, and h is the height or altitude of the triangle. The term ‘base’ denotes any side, and ‘height’ denotes the length of a perpendicular from the point opposite the side onto the side itself.

# Shell program/script to read the base and height of a traingle and find its area # ------------------------------------------------------------------------- # Copyright (c) 2005 nixCraft project <http://cyberciti.biz/fb/> # This script is licensed under GNU GPL version 2.0 or above # ------------------------------------------------------------------------- # This script is part of nixCraft shell script collection (NSSC) # Visit http://bash.cyberciti.biz/ for more information. # ------------------------------------------------------------------------- # Formula info: http://www.mste.uiuc.edu/dildine/heron/triarea.html # Area=(1/2) x Base x Height echo -n "Enter base of a triangle : " read b echo -n "Enter height of a triangle : " read h # calculate it and display back area=$(echo "scale=2;(1/2) * $b * $h"|bc) echo "Area of a triangle is $area"