...triangle by its sides. RULE 8. From half the sum of the three sides subtract each side separately ; then multiply the half sum and the three remainders continually...together, and the square root of the product will equal the area. RULE 4. Multiply the perpendicular height by the length, equal the area. To find the...

...sum of the three sides subtract each side separately ; multiply the half sum and the three remainders together, and the square root of the product will be the area. 4. TRAPEZOID — the sum of the two parallel sides X by half the perpendicular height. 5. CIRCLE =...

...from half the sum subtract each side separately ; then multiply the half sum and the three remainders together, and the square root of the product will be the area required. Let the sides of a triangle be 30, 40, and 50 feet, respectively, what will be the area ? 30 + 40 +...

...area of a TRIANGLE, the three sides being given. side ; multiply the half sum and the three remainders together, and the square root of the product will be the area required. For, let ABC be a triangle whose three sides, AB, BC, AC, are given, but not the altitude CD, and let...

...area may be found as fol. Iowa : From half the sum of the three sides subtract each side severally ; multiply the half sum and the three remainders continually together, and the square root of the last product will be the area required. This method is too prolix, except in particular cases; the...

...half the sum of the three sides subtract each side ; multiply the half sum and the three remainders together, and the square root of the product will be the area required. 1. Required the area of the triangle ABC, whose base, BC, is 210, and altitude, AD, is 190 feet. 210...

...half the sum of the three sides subtract each side ; multiply the half sum and the three remainders together, and the square root of the product will be the area required. 1. Required the area of the triangle ABC, whose base, BC, is 210, and altitude, AD, is 190 feet. 210...

...sides are given. RULE. — From half the sum of the three sides subtract each side separately. Then multiply the half sum and the three remainders continually...together, and the square root of the product will he the area. EXAMPLES. 1. Required the area of a triangle whose three sides are, respectively, 24,...

...sum of the three sides, subtract each side separately; multiply the half sum and the three remainders together, and the square root of the product will be the area required. Note. — When the base and altitude are given, the area is equal to the base multiplied by half the...

...sides only are given. EULE. — From half the sum of the three sides subtract each side sepa~ rately : multiply the half sum and the three remainders continually...square root of the product will be the area required.* • Demonstration.—Let AC=c, CB=<7, and AB=6; and c»—d'=AD a —DB» (e+d) (f—d)=(AD+DB) (AD—DB);...