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An Essay on Mechanical Geometry, Explanatory of a Set of Models
Sin vista previa disponible - 2019
180 degrees Analemma angle ACD angles are equal arithmetic arithmetical mean base breadth Bristol called circle compasses conceived consequently contained Corollary diagonal distance draw a line Euclid exactly cover fame number figure find the content four numbers frustum Gauging geometrical mean Geometrician Geometry globe half the circumference half the diameter height Hence hypothenuse inches inscribed large cube length lesser square line CD mathematical mean measure method multiply half number of degrees number of feet numbers are proportional object opposite angles orem parallel lines parallel ruler parallelogram perpendicular planes pole prism Problem 9 propositions protractor radius rectangle regular polygon rhomboides rhombus right angles right line rule of three ruler Scholium semicircle shewn similar solid square feet square root surface Theorem third Thomas Beddoes three angles trapezium triangle ABC triplicate ratio wine gallons yards young student
Página 6 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
Página 25 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz. either the sides adjacent to the equal...
Página 26 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Página 14 - ... the three angles of a triangle are together equal to two right angles, although it is not known to all.
Página 39 - A right circular cone is often called a cone of revolution, because it can be generated by the revolution of a right-angled triangle about one of its shorter sides.
Página 12 - POSTULATES. 1. LET it be granted that a straight line may be drawn from any one point to any other point. 2. That a terminated straight line may be produced to any length in a straight line. 3. And that a circle may be described from any centre, at any distance from that centre.
Página 67 - Multiply half the circumference by half the diameter, and the product will be the area. Or, divide the product of the whole circumference and diameter -by 4, and the quotient will be the area. 2. Multiply the square of the diameter by .7854, and the product will be the area.
Página 86 - ... reafonable creatures •, for though we all call ourfelves fo, becaufe we are born to it if we pleafe, yet we may truly fay Nature gives us but the...