Elements of geometry and mensurationLongman, Brown, Green, and Longmans, 1854 - 192 páginas |
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Página 9
... compasses . 18. A semi - circle is the half of a circle , bounded by the half of the circumference and the diameter joining its extremities . A quadrant is the quarter of a circle , or the half of a semi - circle , bounded by the fourth ...
... compasses . 18. A semi - circle is the half of a circle , bounded by the half of the circumference and the diameter joining its extremities . A quadrant is the quarter of a circle , or the half of a semi - circle , bounded by the fourth ...
Página 87
... Compasses Proportional Areas ....... Architectural Mouldings .... Arches ........ 115 116 120 135 139 147 148 150 166 169 Ovals ............... 175 Tesselated Pavement and Inlaid Work 180 Questions and Exercises E. 185 ELEMENTS OF ...
... Compasses Proportional Areas ....... Architectural Mouldings .... Arches ........ 115 116 120 135 139 147 148 150 166 169 Ovals ............... 175 Tesselated Pavement and Inlaid Work 180 Questions and Exercises E. 185 ELEMENTS OF ...
Página 89
... COMPASSES consist of two equal legs con- nected together by a hinge or joint at one end of each , and having the other ends worked down to fine points , which meet closely when the legs are brought into con- tact , that is , when the ...
... COMPASSES consist of two equal legs con- nected together by a hinge or joint at one end of each , and having the other ends worked down to fine points , which meet closely when the legs are brought into con- tact , that is , when the ...
Página 95
... compasses . Open the legs until their extreme points exactly coincide with the ex- tremities of the given line ; then fix the foot of one leg on the point which is to be the centre , and by making the compasses to revolve round this ...
... compasses . Open the legs until their extreme points exactly coincide with the ex- tremities of the given line ; then fix the foot of one leg on the point which is to be the centre , and by making the compasses to revolve round this ...
Página 96
... compasses can conveniently be separated , another instrument is used called BEAM - COMPASSES . This instrument consists of a beam or bar , AB , in the lower side of which , near A one extremi- ty is fixed a steel point , as A ; and ...
... compasses can conveniently be separated , another instrument is used called BEAM - COMPASSES . This instrument consists of a beam or bar , AB , in the lower side of which , near A one extremi- ty is fixed a steel point , as A ; and ...
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Términos y frases comunes
ABCDEF acres base bisect breadth centre chain chord circular circum circumference circumscribing circle compasses construction contained continued fraction curved decimal Diagonal Scale diagram diameter distance divided draw drawn edge equilateral triangle find the area find the length fraction frustum given angle given circle given line given point given straight line given triangle half height Hence hexagon inscribed instrument intersecting join Let ABCD lineal unit magnitude meet multiplied number of equal number of sides number of units opposite angle parallelogram perimeter perpendicular plane surface plot points of division PROB produced PROP proportional Protractor radii radius ratio rectangle rectangular regular polygon represent right angles shew shewn similar similar triangles square feet square foot square inches straight edge subtends suppose trapezium triangle ABC vernier vertex whole yards
Pasajes populares
Página 32 - If a straight line be divided into any two parts, the square of the whole line is equal to the squares of the two parts, together with twice the rectangle contained by the parts.
Página 19 - To draw a straight line at right angles to a given straight line, from a given point in the same.
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 32 - If the square described upon one of the sides of a triangle, be equal to the squares described upon the other two sides of it; the angle contained by these two sides is a right angle.
Página 43 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Página 17 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Página 22 - Theorem. The greater side of every triangle is opposite to the greater angle. Let ABC be a triangle of which the side AC is greater than the side AB ; the angle ABC is also greater than the angle BCA. Because AC is greater than AB, make...
Página 192 - The circumference of every circle is supposed to be divided into 360 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, and these into thirds, fourths, &c.
Página 126 - Upon a given straight line to describe a segment of a circle, which shall contain an angle equal to a given rectilineal angle.
Página 20 - To draw a straight line perpendicular to a given straight line of an unlimited length, from a given point without it.