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 12
Nathan Scholfield. AXIOMS . 1. Quantities which are equal to the same quantities , are equal to each other . 2. If equals be added to equals , the wholes will be equal . 3. If equals be taken from equals , the remainders will be equal . 4.
Nathan Scholfield. AXIOMS . 1. Quantities which are equal to the same quantities , are equal to each other . 2. If equals be added to equals , the wholes will be equal . 3. If equals be taken from equals , the remainders will be equal . 4.
Page 35
... equal to two right angles . Cor . 1. If one of the angles ACD , BCD , is right , the other is right also . Cor . 2. If the line DE is perpendicu- lar to AB , reciprocally AB will be per- pendicular to DE . For , since DE is ...
... equal to two right angles . Cor . 1. If one of the angles ACD , BCD , is right , the other is right also . Cor . 2. If the line DE is perpendicu- lar to AB , reciprocally AB will be per- pendicular to DE . For , since DE is ...
Page 36
... equal to each other ( Prop . II . ) ; therefore the whole angle FCD is equal to the part FCE , which is ab- surd . PROPOSITION VI . THEOREM . If two right lines intersect each other , the opposite angles formed at their intersection ...
... equal to each other ( Prop . II . ) ; therefore the whole angle FCD is equal to the part FCE , which is ab- surd . PROPOSITION VI . THEOREM . If two right lines intersect each other , the opposite angles formed at their intersection ...
Page 37
... equal , those lines shall form but two right lines . Let the four right lines AE , BE , CE , DE , meet in the point E ( see the diagram to last proposition ) , so that the op- posite angles CEB , AED , may be equal ; and also the other ...
... equal , those lines shall form but two right lines . Let the four right lines AE , BE , CE , DE , meet in the point E ( see the diagram to last proposition ) , so that the op- posite angles CEB , AED , may be equal ; and also the other ...
Page 38
Nathan Scholfield. For , since AB is equal to DE , and the angle A equal to the angle D , a triangle equal to DEF may be conceived to be formed , of which AB shall be one side , and A an angle ; now it is obvious that the side of this ...
Nathan Scholfield. For , since AB is equal to DE , and the angle A equal to the angle D , a triangle equal to DEF may be conceived to be formed , of which AB shall be one side , and A an angle ; now it is obvious that the side of this ...
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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.