The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art. With a New Set of Accurate Mathematical TablesA. S. Barnes, 1839 - 412 páginas |
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Página 41
... right ones , it is then called a right - lined angle , as ABC , fig . 4. If one of them be right and the other ... angles ADC , CDB , on each side equal to each other , then those angles are called right angles , and the line CD a ...
... right ones , it is then called a right - lined angle , as ABC , fig . 4. If one of them be right and the other ... angles ADC , CDB , on each side equal to each other , then those angles are called right angles , and the line CD a ...
Página 42
... right angles , and thus the periphery is divided into four equal parts , as BD , DA , AE , and EB ( by def . 10 ) ; and so BD becomes a quad- rant , or the fourth part of the periphery ; therefore the radius DC is always the sine of a ...
... right angles , and thus the periphery is divided into four equal parts , as BD , DA , AE , and EB ( by def . 10 ) ; and so BD becomes a quad- rant , or the fourth part of the periphery ; therefore the radius DC is always the sine of a ...
Página 43
... right - lined angle is the arc of a circle swept from the angular point ... angles are greater or less according as the are described about the angular point , and terminated by the two sides ... angled , having all the angles 4 GEOMETRY . 43.
... right - lined angle is the arc of a circle swept from the angular point ... angles are greater or less according as the are described about the angular point , and terminated by the two sides ... angled , having all the angles 4 GEOMETRY . 43.
Página 44
... angles acute , as F , fig . 15 . 39. Acute and obtuse - angled triangles are in general called oblique - angled ... right is called a square , as ABCD , fig . 17 . 44. A parallelogram whose opposite sides are equal and angles right is ...
... angles acute , as F , fig . 15 . 39. Acute and obtuse - angled triangles are in general called oblique - angled ... right is called a square , as ABCD , fig . 17 . 44. A parallelogram whose opposite sides are equal and angles right is ...
Página 45
... right line may be produced or continued at pleasure . 3. That from any centre and with any radius the circum- ference of a circle may be described . 4. It is also required that the equality of lines and angles to others given , be ...
... right line may be produced or continued at pleasure . 3. That from any centre and with any radius the circum- ference of a circle may be described . 4. It is also required that the equality of lines and angles to others given , be ...
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Términos y frases comunes
ABCD acres altitude arch base bearing blank line centre chains and links circle circumferentor column compasses contained Cosine Sine cube root decimal diagonal diameter difference of latitude divided divisions divisor draw east ecliptic edge EXAMPLE feet field-book figure four-pole chains geometrical series given angle given number half the sum height Hence horizon glass hypothenuse inches instrument length logarithm manner measure meridian distance multiplied needle nonius number of degrees object observed opposite parallelogram perches perpendicular plane prob PROBLEM proportion protractor quadrant quotient radius rhombus right angles right line scale of equal screw secant sect sector semicircle side Sine Cotang square root station stationary distance subtract suppose survey taken Tang tangent theo theodolite THEOREM trapezium triangle ABC trigonometry two-pole chains vane vulgar fraction whence
Pasajes populares
Página 49 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Página 41 - 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, &c.
Página 41 - The radius of a circle is a right line drawn from the centre to the circumference.
Página 45 - A lemma is something which is premised, or demonstrated, in order to render what follows more easy. A corollary is a consequent truth derived immediately from some preceding truth or demonstration.
Página 35 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.
Página 21 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.