Elements of Geometry and Trigonometry: With Applications in MensurationA.S. Barnes & Company, 1870 - 319 σελίδες |
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Σελίδα 55
... inches in length , two inches wide , and one fifth of an inch in thickness . It should be made of a hard material , and perfectly straight and smooth . PROBLEM III . To draw a straight line through two given points A and B. Place one ...
... inches in length , two inches wide , and one fifth of an inch in thickness . It should be made of a hard material , and perfectly straight and smooth . PROBLEM III . To draw a straight line through two given points A and B. Place one ...
Σελίδα 176
... inch . which is divided , is called the unit of the scale . laid off several times on the left of the divided ... inch , or an exact part of an inch . If , for example , ab the unit Description of Instruments . of the scale , were half ...
... inch . which is divided , is called the unit of the scale . laid off several times on the left of the divided ... inch , or an exact part of an inch . If , for example , ab the unit Description of Instruments . of the scale , were half ...
Σελίδα 177
... inch , the scale would be cne of 10 parts to half an inch , or of 20 parts to the inch . If it were required to take from the scale a line equal to two inches and six - tenths , place one foot of the dividers at 2 on the left , and ...
... inch , the scale would be cne of 10 parts to half an inch , or of 20 parts to the inch . If it were required to take from the scale a line equal to two inches and six - tenths , place one foot of the dividers at 2 on the left , and ...
Σελίδα 180
... tractor . GUNTERS ' SCALE . 18. This is a scale of two feet in length , on the faces of which a variety of scales is marked . The face on which the Definitions . divisions of inches are made , contains , 180 TRIGONOMETRY .
... tractor . GUNTERS ' SCALE . 18. This is a scale of two feet in length , on the faces of which a variety of scales is marked . The face on which the Definitions . divisions of inches are made , contains , 180 TRIGONOMETRY .
Σελίδα 181
With Applications in Mensuration Charles Davies. Definitions . divisions of inches are made , contains , however , all the scales necessary for laying down lines and angles . These are , the scale of equal parts , the diagonal scale of ...
With Applications in Mensuration Charles Davies. Definitions . divisions of inches are made , contains , however , all the scales necessary for laying down lines and angles . These are , the scale of equal parts , the diagonal scale of ...
Άλλες εκδόσεις - Προβολή όλων
Συχνά εμφανιζόμενοι όροι και φράσεις
adjacent angles allel alternate angles altitude angle ACB angles equal base multiplied bisect called centre chains chord circle whose diameter circumference cone consequently convex surface Cosine Cosine D Cotang cubic cylinder decimal diagonal dicular distance divided draw drawn equal Bk equal Th equal to half equivalent feet figure find the area frustum half the arc half the product hence horizontal hypothenuse inches included angle inscribed intersect Let ABC logarithm lower base M.
M. Sine measured by half Mensuration of Surfaces number of sides opposite angles outward angle parallel parallelogram parallelopipedon pendicular perimeter perpen perpendicular plane prism PROBLEM proportion quadrilateral radius ratio rectangle regular polygon Required the area rhombus right angled triangle right angles Th segment side AC similar similar triangles slant height solidity sphere straight line suppose Tang tangent THEOREM triangle ABC yards
Δημοφιλή αποσπάσματα
Σελίδα 48 - After remarking that the mathematician positively knows that the sum of the three angles of a triangle is equal to two right angles...
Σελίδα 12 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, etc.
Σελίδα 29 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Σελίδα 85 - If two triangles have two sides and the included angle of the one, equal to two sides and the included angle of the other, each to each, the two triangles will be equal in all their parts." Axiom 1. "Things which are equal to the same thing, are equal to each other.
Σελίδα 198 - To find the area of a trapezoid. RULE. Multiply the sum of the parallel sides by the perpendicular distance between them, and then divide the product by two : the quotient will be the area (Bk.
Σελίδα 159 - In every plane triangle there are six parts : three sides and three angles. These parts are so related to each other, that when one side and any two other parts are given, the remaining ones can be obtained, either by geometrical construction or by trigonometrical computation.
Σελίδα 187 - Being on a horizontal plane, and wanting to ascertain the height of a tower, standing on the top of an inaccessible hill, there were measured, the angle of elevation of the top of the hill 40°, and of the top of the tower 51° ; then measuring in a direct line 180 feet farther from the hill, the angle of elevation of the top of the tower Cway 33° 45' ; required the height of the tower.
Σελίδα 79 - If a straight line be divided into any two parts, the square of the whole line is equal to the squares of the two parts, together with twice the rectangle contained by the parts.
Σελίδα 119 - If a cone be cut by a plane parallel to the base, the section will be a circle.