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 44
... , DEF , the angles B and E are equal , being right angles , the side BA = ED by hypothesis , and the side BG = EF by construction : consequently , AG = DF ( Prop . VIII . Cor . 2. ) But by hypothesis AC 44 ELEMENTS OF GEOMETRY .
... , DEF , the angles B and E are equal , being right angles , the side BA = ED by hypothesis , and the side BG = EF by construction : consequently , AG = DF ( Prop . VIII . Cor . 2. ) But by hypothesis AC 44 ELEMENTS OF GEOMETRY .
Page 46
... construction ; therefore , GFB is a right angle ; hence the two lines EC , BD , are perpendicular to the same straight line , and are therefore parallel ( Prop . XXI . ) Scholium . When two parallel straight lines AB , CD 46 ELEMENTS OF ...
... construction ; therefore , GFB is a right angle ; hence the two lines EC , BD , are perpendicular to the same straight line , and are therefore parallel ( Prop . XXI . ) Scholium . When two parallel straight lines AB , CD 46 ELEMENTS OF ...
Page 77
... construction serves for making a right angle BAD , at a given point A , on a given right line BC . PROBLEM III . To erect a perpendicular at or near the end of a given line . From any point C taken without the line with a radius equal ...
... construction serves for making a right angle BAD , at a given point A , on a given right line BC . PROBLEM III . To erect a perpendicular at or near the end of a given line . From any point C taken without the line with a radius equal ...
Page 78
... the vertex Cas a centre , the arc AEB ; which is then bisected as above . It is plain that the line CD will divide the angle ACB into two equal parts . Scholium . By the same construction , each of the 78 ELEMENTS OF GEOMETRY .
... the vertex Cas a centre , the arc AEB ; which is then bisected as above . It is plain that the line CD will divide the angle ACB into two equal parts . Scholium . By the same construction , each of the 78 ELEMENTS OF GEOMETRY .
Page 79
Nathan Scholfield. Scholium . By the same construction , each of the halves AE , EB , may be divided into two equal parts ; and thus , by successive divisions , a given angle , or a given arc may be divided into four equal parts , into ...
Nathan Scholfield. Scholium . By the same construction , each of the halves AE , EB , may be divided into two equal parts ; and thus , by successive divisions , a given angle , or a given arc may be divided into four equal parts , into ...
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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.