Haswell, Charles Haynes, 1809- [from old catalog] · New York, Harper & brothers · leaf 249
rea ?10X10 = 103, and 6X6 = 36. Then 100 — 36 = 64 square ms. TRIANGLES.Definition—Plain superficies having three sides and angles. To Compute the Area of a Triangle-Figs. 5, 6, and. *7.Rule.—Multiply the base by the height, and divide the product by 2.Or, —. Or, —— = area, b representing the base,… … Example. — The base a &,Fig. 5, is 4 feet, and the heightc b, 6 ; what is the area?4X6= 24, and 24 +- 2 = 12square feet. MENSURATION OF AREAS, LINES, AND SURFACES. 245 To Compute tlie Area of a Triangle by the Length,of its Sides-Figs. 6 and 7. Rule.—From half the sum of the three sides…
Engineering · Mechanical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
