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Longmans, Green and Company, 1879 - 188 sider

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Side 2 - A plane rectilineal angle is the inclination of two straight lines to one another, which meet together, but are not in the same straight line.
Side 8 - We wish to prove that The three angles of any triangle are equal to two right angles. Let...
Side 70 - The circumference of a circle is divided into 360 equal parts, called degrees; each degree into 60 minutes ; each minute into 60 seconds.
Side 31 - From half the sum of the three sides, subtract each side separately; multiply the half -sum and the three remainders together; the square root of the product is the area.
Side 128 - A sphere is a solid bounded by a curved surface, every point of which is equally distant from a point within called the center.
Side 57 - To find the area of a circle, multiply the square of the diameter by .7854.
Side 5 - A circle is a plane figure bounded by a curved line called the circumference, every point of which is equally distant from a point within called the center, Fig.
Side 2 - But when a straight line standing upon another straight line makes the adjacent angles equal to one another, each of the angles is a right angle : (Ю.
Side 41 - Multiply the sum of the parallel sides by the perpendicular distance between them, and half the product will be the area.
Side 71 - Or, from 8 times the chord of half the arc, subtract the chord of the whole arc, and $ of the remainder will be the length of the arc, nearly.

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