## A course of practical geometry for mechanics |

### From inside the book

Results 1-5 of 30

Page 7

...

...

**given**to objects which would require more paper than could be spared to assign to the horizon its true position ...**Angle**, i . e . , one which is either greater , or less than a right**angle**. 6. A Tangent is a line that touches a circle ... Page 14

...

...

**given**radiating distance throughout . 30. Parallel Planes are such as are at any**given**perpen- dicular distance ...**angle**at the Circumference of a polygon , is that which is contained by any two sides . 35. The**angle**at the Centre , is ... Page 16

...

...

**angle**is subtended . 52. If two radii be drawn in a circle , the**angle**contained by them is called the**angle**at the ...**given**lines for its base , and the other for its height . 55. A Multiple of a line or figure , is another line or ... Page 19

...

...

**given**; secondly , something is wanted ; and thirdly , to obtain the second from the first , certain means must be employed ; these are called lines of construction , and are always to be ...**given**rectilineal**angle**PRACTICAL GEOMETRY . 19. Page 20

... angle . Call this the

... angle . Call this the

**given angle**. Print or write ( with the lead pencil ) any letters at the ex- tremities of these lines , ( as BA C , in the diagram annexed , ) simply that the lines may be easily referred to . 2. Having fixed the ...### Other editions - View all

### Common terms and phrases

60 degrees altitude angle equal arc or angle Bisect called centre chords shall form circumference curvilineal cutting A B decagon describe a circle describe a regular describe an arc describe arcs cutting diagonals diameter dodecagon Draw a line Draw chords draw lines Draw the line ellipse equilateral triangle Euclid Euclid's Elements EXAMPLE generatrix geometry given angle given circle given line given point given right line given triangle gonals heptagon inches long inscribe isosceles triangle Join length Let A B line 2 inches line A B line parallel LVIII number of degrees number of equal parallel ruler parallelogram pentagon perpendicular plane point of intersection protractor radii radius ratio rectangle regular nonagon regular polygon rhombus right angles right-angled triangle segment square equal straight line superficies tangent trapezium triangle being given triangle equal triangle required vertex vertical angle Vide Def vide Prob

### Popular passages

Page 8 - A plane rectilineal angle is the inclination of two straight lines to one another, -which meet together, but are not in the same straight line.

Page 10 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.

Page 9 - CHG; and they are adjacent angles; but when a straight line standing on another straight line makes the adjacent angles equal to one another...

Page 9 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another.

Page 13 - Of four-sided figures, a SQUARE is that which has all its sides equal, and all its angles right angles.

Page 9 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle; and the straight line which stands on the other is called a perpendicular to it.

Page 14 - Parallel straight lines are such as are in the same plane, and which being produced ever so far both ways, do not meet.

Page 8 - A plane angle is the inclination of two lines to one another* in a plane, which meet together, but are not in the same direction.

Page 13 - A rhomboid, is that which has its opposite sides equal to one another, but all its sides are not equal, nor its angles right angles.

Page 8 - DBC, or CBD ; but, if there be only one angle at a point, it may be expressed by a letter placed at that point ; as the angle at E.