...given, find their half sum, and from this half sum subtract each of the three sides separately, and then multiply together the half sum and the three remainders ; the square root of the product will be the required area. RULE III. To fmd the area of a trapezoid. Multiply the half sum of the two parallel...

...area of a triangle, three sides being given, Fig. 63, Plate 4. sides, and multiply the half sum by the three remainders, the square root of the product will be the area. Given AB = 810 links, AC = 476 links, BC = 549 links. = 917.5 then 917.5 - 810 = 107.5 917.5 - 476...

...follows : From the half-sum of the sides subtract each side separately. Find the continued product of the half -sum and the three remainders. The square root of the product is equal to the area of the triangle. Ex. Find the area of a triangle having a base 16 ft. and altitude...

...are given, from half the sum of the three sides subtract each side separately. Find the product of the half sum and the three remainders. The square root of the product will be the area of the triangle. 1. Find the area of a triangle whose sides are 6, 8, and 10 ft. OPERATION (6 + 8 +...

...by two; from Fig. i6. this half sum subtract the length of each side in turn; multiply together this half sum and the three remainders; the square root of the product equals the desired area. Thus, if a, b, and c are three sides of a triangle, , a + b+c ,, and s = ,...

...^-£=area. (Fig. 6, page 51.) Or from half the sum of the three sides subtract each side separately, multiply together the half sum and the three remainders, the square root of the product is the area. This rule is indicated by the following formula : Let 4=area =11.01 + a = one side = 4"...