A Treatise on Practical Surveying: Which is Demonstrated from Its First Principles, Wherein Every Thing that is Useful and Curious in that Art, is Fully Considered and ExplainedF. Lucas, Jun. and Joseph Cushing, 1816 - 472 páginas |
Dentro del libro
Resultados 1-5 de 100
Página 30
... side , equal to each other , these angles are called right angles , and the line CD a perpendicular . Fig . 7 . A Fig . 5 . B fig . 6 . E 12. An obtuse angle is that which is greater than than a right one , as the angle ADE , fig . 7 ...
... side , equal to each other , these angles are called right angles , and the line CD a perpendicular . Fig . 7 . A Fig . 5 . B fig . 6 . E 12. An obtuse angle is that which is greater than than a right one , as the angle ADE , fig . 7 ...
Página 32
... sides ; and 2d , to its angles . 20. In respect to its sides it is ei- ther equilateral , having the three sides equal , as A. fig . 10 . 21. Or isosceles , having two equal sides , as B. fig . 11 . 22. Or scalene , having the three sides ...
... sides ; and 2d , to its angles . 20. In respect to its sides it is ei- ther equilateral , having the three sides equal , as A. fig . 10 . 21. Or isosceles , having two equal sides , as B. fig . 11 . 22. Or scalene , having the three sides ...
Página 33
... side may be called the base , and the other two the sides . 27. The perpendicular height of a triangle is a line drawn from the vertex to the base perpendicu- larly thus if the triangle ABC , be proposed , and BC be made its base , then ...
... side may be called the base , and the other two the sides . 27. The perpendicular height of a triangle is a line drawn from the vertex to the base perpendicu- larly thus if the triangle ABC , be proposed , and BC be made its base , then ...
Página 34
... sides are all equal and angles right , is call- ed a square , as ABCD . fig . 17 . 31. A parallelogram whose op- posite sides are equal and angles right , is called a rectangle or an ob- long , as ABCD , fig . 3 . 32. A rhombus is a ...
... sides are all equal and angles right , is call- ed a square , as ABCD . fig . 17 . 31. A parallelogram whose op- posite sides are equal and angles right , is called a rectangle or an ob- long , as ABCD , fig . 3 . 32. A rhombus is a ...
Página 38
... side of a right line ; all the angles made by these lines will be equal to two right angles . 2. And all the angles which can be made about a point , will be equal to four right angles . THEOREM II . If one right line cross another ...
... side of a right line ; all the angles made by these lines will be equal to two right angles . 2. And all the angles which can be made about a point , will be equal to four right angles . THEOREM II . If one right line cross another ...
Otras ediciones - Ver todas
A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Sin vista previa disponible - 2021 |
Términos y frases comunes
20 perches 50 Dist ABCD acres altitude annexed Answer base bearing bisect blank line centre chains and links chord circle circumferentor Co-secant Secant Co-sine Co-tang column contained cyphers decimal decimal fraction Dep Lat difference divided divisor draw east edge EXAMPLE feet field-book figures four-pole chains given angle half the sum height Hence hypothenuse inches instrument latitude length logarithm magnetical measure meridian distance multiplied needle number of degrees object off-sets parallel parallelogram perpendicular piece of ground plane Portmarnock PROB proportion protractor quotient radius right angles right line scale of equal SCHOLIUM sect semicircle side sights sine square root stationary distance sun's suppose survey taken tance Tang tangent thence theo theodolite THEOREM thro trapezium triangle ABC trigonometry true amplitude true azimuth two-pole chains vane variation whence