## A graduated course of problems in practical plane and solid geometry |

### Inni boken

Resultat 1-5 av 62

Side

... Geometry , three kinds of lines are used , viz . , ( 1 ) thin lines , representing

those which are given ; ( 2 ) dotted lines , representing those used in the

construction of the

problem .

... Geometry , three kinds of lines are used , viz . , ( 1 ) thin lines , representing

those which are given ; ( 2 ) dotted lines , representing those used in the

construction of the

**figure**; and ( 3 ) thick lines , representing the solution of theproblem .

Side

In the

triangular piece of wood ABC , having the edge BC at right angles to AB . It forms

a cheap and convenient instrument for drawing perpendicular or parallel lines ...

In the

**figure**, GH represents a drawing - board . 5 . The Set - Square . - - This is atriangular piece of wood ABC , having the edge BC at right angles to AB . It forms

a cheap and convenient instrument for drawing perpendicular or parallel lines ...

Side

... a line drawn on the paper between these two points will give two straight lines

inclined to each other at an angle of 60° . 9 . Proportional Compasses . — This

instrument is used for reducing or enlarging a

... a line drawn on the paper between these two points will give two straight lines

inclined to each other at an angle of 60° . 9 . Proportional Compasses . — This

instrument is used for reducing or enlarging a

**figure**in any required proportion . Side

For example , if OG be double OH , then GE will be double HF , and the legs so

divided would enable us to enlarge a

half its size . 10 . Diagonal Scale . 11 . Scale of Chords . Note . For a description

of ...

For example , if OG be double OH , then GE will be double HF , and the legs so

divided would enable us to enlarge a

**figure**to double its size , or to reduce it tohalf its size . 10 . Diagonal Scale . 11 . Scale of Chords . Note . For a description

of ...

Side 4

A circle is a

, and is such that every portion of it is equidistant from a certain point within it

called its centre . Ex . A15 . An arc is any portion of the circumference . Ex . AB16 .

A circle is a

**figure**contained by one curved line , which is called its circumference, and is such that every portion of it is equidistant from a certain point within it

called its centre . Ex . A15 . An arc is any portion of the circumference . Ex . AB16 .

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altitude arc cutting Atlas axis base bound called centre circumference cloth complete cone construct contained curve cutting cylinder describe a circle describe an arc describe arcs determine diagonal distance divide division draw a line draw lines drawn edge elevation ellipse equal equal in area equilateral triangle extremities face figure four given circle given line given point given triangle ABC half height hexagon horizontal plane inches inclined inscribe intersection isosceles triangle Join length lines parallel Maps mark meeting NOTE obtain parallel parallelogram pass pentagon perpendicular Philips plane of projection polygon prism Problem produced projection projectors pyramid radii radius rectangle rectilineal figure regular represent required circle respectively right angles scale seen semicircle sides similar solid square tangent touching traces trapezium vertical plane

### Populære avsnitt

Side 295 - Philips' Preparatory Atlas, Containing Sixteen Maps, full colored. Crown quarto, in neat cover, 6d. Philips Preparatory Outline Atlas. Sixteen Maps. Crown quarto, printed on fine cream-wove paper, in neat cover, 6d. Philips Preparatory Atlas of Blank Projections. Sixteen Maps. Crown quarto, printed on fine cream-wove paper, in neat cover, 6d. Philips Elementary Atlas for Young Learners.

Side 294 - Young Student's Atlas, Comprising Thirty-six Maps of the Principal Countries of the World, printed in colors. Edited by W. Hughes, FRGS Imperial 41.0., bound in cloth, 33. 6d. Philips Atlas for Beginners, Comprising Thirty-two Maps of the Principal Countries of the World, constructed from the best authorities, and engraved in the best style. New and enlarged edition, with a valuable Consulting Index, on a new plan.

Side 193 - A cone is a solid figure described by the revolution of a right-angled triangle about one of the sides containing the right angle, which side remains fixed. If the fixed side be equal to the other side containing the right angle, the cone is called a right-angled cone ; if it be less than the other side, an obtuse-angled ; and if greater, an acute-angled cone. XIX. The axis of a cone is the fixed straight line about which the triangle revolves.

Side 123 - A straight line is said to be cut in extreme and mean ratio, when the whole is to the greater segment as the greater segment is to the less.