RATOR S ASSISTANT. Area, this term is a Latin word, and signifiesthe same thing as superfices or quantity ofsurface, but is applied exclusively to planefigures. Thus we say, the surface of a sphere,the area of a triangle, and the surface of acube, is six times the area of one of its faces.The word… … Example 1.—Measure a side a b of thetriangle a b c, and the perpendicular c d, whichis let fall upon it from the opposite vertex,both in units. Half the product of a e and c dis the number of square units in the triangleABC. Thus, if a B be 30 yai-ds and c d 16yards, the triangle contains 240…
Design · Decoration and ornament · Art
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