Elements of plane (solid) geometry (Higher geometry) and trigonometry (and mensuration), being the first (-fourth) part of a series on elementary and higher geometry, trigonometry, and mensuration |
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Page 5
... portion and proportional figures before that of the squares of the sides of right angled triangles , we are enabled to present a new demonstration for that proposition founded on the pro- portionality of the sides of similar triangles ...
... portion and proportional figures before that of the squares of the sides of right angled triangles , we are enabled to present a new demonstration for that proposition founded on the pro- portionality of the sides of similar triangles ...
Page 22
... portion are manifestly equal . PROPOSITION XV . THEOREM . If of four proportional quantities the two consequents be either augmented or diminished by the antecedents , or by quantities having the same ratio as the antecedents , the re ...
... portion are manifestly equal . PROPOSITION XV . THEOREM . If of four proportional quantities the two consequents be either augmented or diminished by the antecedents , or by quantities having the same ratio as the antecedents , the re ...
Page 28
... portion , it follows that the two magnitudes can only be ex- pressed by a series of ratios in continued proportion , decreas- ing to infinity , according to a definite order , which series , being regarded as the function of one of the ...
... portion , it follows that the two magnitudes can only be ex- pressed by a series of ratios in continued proportion , decreas- ing to infinity , according to a definite order , which series , being regarded as the function of one of the ...
Page 34
... portion of ABC . Let ABƒ represent that por- tion ; then , because ABf is a right angle , Bf is perpendicular to AB ( Def . 12. ) ; but ABC is also a right angle , therefore BC is likewise perpendicular to AB , Α C BD F that is , from ...
... portion of ABC . Let ABƒ represent that por- tion ; then , because ABf is a right angle , Bf is perpendicular to AB ( Def . 12. ) ; but ABC is also a right angle , therefore BC is likewise perpendicular to AB , Α C BD F that is , from ...
Page 58
... portion of a circumference . H G 7. A chord of an arc is a right line joining the extremities of that arc . Hence , it is said to subtend the arc . 8. A segment of a circle is the surface included between an arc and its chord . The ...
... portion of a circumference . H G 7. A chord of an arc is a right line joining the extremities of that arc . Hence , it is said to subtend the arc . 8. A segment of a circle is the surface included between an arc and its chord . The ...
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Elements of Plane (Solid) Geometry (Higher Geometry) and Trigonometry (and ... Nathan Scholfield No preview available - 2015 |
Common terms and phrases
ABCD abscissa altitude axis bisect chord circle circular segment circum circumference circumscribing cone conjugate construction convex surface cosec cosine cube curve cylinder described diameter distance divided draw ellipse equal to half equation equivalent feet figure formed frustum Geom geometry given hence hyperbola hypothenuse inches inscribed inscribed sphere latus rectum length logarithm magnitude measured multiplied by one-third number of sides opposite ordinates parabola parallel parallelogram perimeter perpendicular plane polyedroid polyedron polygon portion prism PROBLEM Prop proportional PROPOSITION pyramid quadrant quadrilateral quantities radii radius ratio rectangle regular polygon revoloid rhomboid right angled triangle right line root Scholium sector segment similar similar triangles sine slant height solid angle sphere spherical square straight line tangent THEOREM triangle ABC triangular triangular prism ungula vertex vertical virtual centre
Popular passages
Page 36 - Prove that parallelograms on the same base and between the same parallels are equal in area.
Page 35 - The sum of any two sides of a triangle, is greater than the third side.
Page 60 - A tangent to a circle is perpendicular to the radius drawn to the point of contact.
Page 56 - In the same circle, or in equal circles, equal arcs are subtended by equal chords ; and, conversely, equal chords subtend equal arcs.
Page 38 - The volumes of similar solids are to each other as the cubes of their like dimensions.
Page 75 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Page 86 - If there be two straight lines, one of which is divided into any number of parts, the rectangle contained by the two straight lines is equal to the rectangles contained by the undivided line, and the several parts of the divided line. Let...
Page 211 - To find the solidity of a hyperbolic conoid, or otherwise called a hyperboloid. RULE. To the square of the radius of the base, add the square of the diameter...
Page 48 - Hence, the interior angles plus four right angles, is equal to twice as many right angles as the polygon has sides, and consequently, equal to the sum of the interior angles plus the exterior angles.