>How do you measure the area of a triangle????? To calculate it, >multiply half the base times the height. But would they have to measure >the height - at right angles of course? Given you have the lengths of the three sides, a, b and c, the area can be found from the square root of s(s-a)(s-b)(s-c), where s is half the perimeter. The accuracy would be as good as the measurements of the lengths of the sides. ------ Philip