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Page 39 - To draw a straight line perpendicular to a given straight line of an unlimited length, from a given point without it. Let AB be the given straight line, which may be produced to any length both ways, and let c be a point without it.
Page 62 - Multiply the sum of the parallel sides by the perpendicular distance between them, and half the product will be the area.
Page 56 - To measure a Parallelogram, or long square. RULE. Multiply the length by the breadth, and the product will be the area or superficial content.
Page 65 - TO FIND THE AREA OF A CIRCLE. Rule. — Multiply the square of the diameter by .7854 and the product will be the area.
Page xv - Separate the given number into periods of two figures each, beginning at the right hand: the period on the left will often contain but one figure.
Page 40 - To bisect a given finite straight line, that is, to divide it into two equal parts. Let AB be the given straight line : it is required to divide it intotwo equal parts.
Page 37 - At a given point in a given straight line, to erect a perpendicular to that line. Let AB be the given line and C the given point.
Page iii - EULE.—Divide as in whole numbers, and point off as many decimal places in the quotient as the number of decimal places in the dividend exceeds the number in the divisor.