The New Practical Builder and Workman's Companion, Containing a Full Display and Elucidation of the Most Recent and Skilful Methods Pursued by Architects and Artificers ... Including, Also, New Treatises on Geometry ..., a Summary of the Art of Building ..., an Extensive Glossary of the Technical Terms ..., and The Theory and Practice of the Five Orders, as Employed in Decorative ArchitectureThomas Kelly, 1823 - 596 páginas |
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Resultados 1-5 de 34
Página 13
... CIRCLE is a plain figure , contained under one line only , which is called ... circle . Thus , in fig . 26 , c is the centre , and c d the radius of the circle a bd . 36. The ... SEMI - CIRCLE is the half of a 2 . D ELEMENTS OF GEOMETRY . 13.
... CIRCLE is a plain figure , contained under one line only , which is called ... circle . Thus , in fig . 26 , c is the centre , and c d the radius of the circle a bd . 36. The ... SEMI - CIRCLE is the half of a 2 . D ELEMENTS OF GEOMETRY . 13.
Página 14
Peter Nicholson. 38. A SEMI - CIRCLE is the half of a circle , terminated by a diameter and the semi - circumference . Thus , in fig . 27 , the diameter a b divides the circle into two semi - circles . 39. A SEGMENT of a circle is a ...
Peter Nicholson. 38. A SEMI - CIRCLE is the half of a circle , terminated by a diameter and the semi - circumference . Thus , in fig . 27 , the diameter a b divides the circle into two semi - circles . 39. A SEGMENT of a circle is a ...
Página 31
... circle , is double of the angle at the cirumference , upon the same arc , AB . Fig . 1 . Fig . 2 . D D B Draw DC ... semi - circle . Draw CA , CB , to the ends of the base of the segment ; then each of the angles , ADB , AEB , will be ...
... circle , is double of the angle at the cirumference , upon the same arc , AB . Fig . 1 . Fig . 2 . D D B Draw DC ... semi - circle . Draw CA , CB , to the ends of the base of the segment ; then each of the angles , ADB , AEB , will be ...
Página 32
... semi - circle ; draw the diameter DCF , and join EF ; and , because the segment ADEF is greater than a semi - circle , by the first case , the angle ADF is equal to AEF . In like manner , because the segment BEDF is greater than a semi ...
... semi - circle ; draw the diameter DCF , and join EF ; and , because the segment ADEF is greater than a semi - circle , by the first case , the angle ADF is equal to AEF . In like manner , because the segment BEDF is greater than a semi ...
Página 33
... semi - circle is a right angle . Again , because in the triangle ABD , the angle ABD is a right angle ; there- fore BAD , which is manifestly in a segment less than a semi - circle , is less than a right angle : and , lastly , because ...
... semi - circle is a right angle . Again , because in the triangle ABD , the angle ABD is a right angle ; there- fore BAD , which is manifestly in a segment less than a semi - circle , is less than a right angle : and , lastly , because ...
Términos y frases comunes
ABCD abscissa adjacent angles altitude angle ABD annular vault axes axis major base bisect called centre chord circle circumference cone conic section conjugate contains COROLLARY 1.-Hence cutting cylinder describe a semi-circle describe an arc diameter distance divide draw a curve draw lines draw the lines edge ellipse Engraved equal angles equal to DF equation equiangular figure GEOMETRY given straight line greater groin homologous sides hyperbola intersection join joist latus rectum less Let ABC line of section meet multiplying Nicholson opposite sides ordinate parallel to BC parallelogram perpendicular PLATE points of section polygon PROBLEM produced proportionals quantity radius rectangle regular polygon ribs right angles roof segment similar triangles square straight edge subtracted surface Symns tangent THEOREM timber transverse axis triangle ABC vault vertex wherefore
Pasajes populares
Página 27 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.
Página 20 - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. D c A' D' Hyp. In triangles ABC and A'B'C', ZA = ZA'. To prove AABC = ABxAC. A A'B'C' A'B'xA'C' Proof. Draw the altitudes BD and B'D'.
Página 51 - The area of a parallelogram is equal to the product of its base and its height: A = bx h.
Página 15 - AXIOMS. 1. Things which are equal to the same thing are equal to one another. 2. If equals be added to equals, the wholes are equal. 3. If equals be taken from equals, the remainders are equal.
Página 15 - LET it be granted that a straight line may be drawn from any one point to any other point.
Página 28 - ... angles of another, the third angles will also be equal, and the two triangles will be mutually equiangular. Cor.
Página 81 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Página 80 - The sine of an arc is a straight line drawn from one extremity of the arc perpendicular to the radius passing through the other extremity. The tangent of an arc is a straight line touching the arc at one extremity, and limited by the radius produced through the other extremity.
Página 28 - After remarking that the mathematician positively knows that the sum of the three angles of a triangle is equal to two right angles...
Página 22 - The perpendicular is the shortest line that can be drawn from a point to a straight line.