Elementary Geometrical Drawing ..., Μέρος 2Longmans, Green, 1880 |
Συχνά εμφανιζόμενοι όροι και φράσεις
angle equal centre circle touching circumference circumscribed circles Construct a regular Construct a scale Construct a square Construct a triangle contain an angle Describe a circle describe a square describe the circle diagonal scale diameter Divide a line Divide a straight Draw a circle Draw a line Draw a scale Draw a straight ellipse English miles equal area equal circles furlongs given circle given line given point heptagon inches long inscribe isosceles triangle Join length Let A B C Fig longer side mean proportional Measure and write mètres parallelogram perpendicular to M N plain scale polygon PROBLEM protractor radii rectangle regular nonagon regular pentagon regular polygon regular undecagon representative fraction required Euc rhombus right angles scale of yards sector segment straight line A B third proportional toises transverse distance triangle A B C triangle of equal vernier scale versts
Δημοφιλή αποσπάσματα
Σελίδα 88 - AB be the given straight line ; it is required to divide it into two parts, so that the rectangle contained by the whole, and one of the parts, shall be equal to the square of the other part.
Σελίδα 42 - Upon a given straight line to describe a segment of a circle, which shall contain aa angle equal to a given rectilineal angle.
Σελίδα 42 - Algebraically a given line (a) into two parts, such that the rectangle contained by the whole and one part may be equal to the square of the other part.
Σελίδα 21 - Bisect a triangle by a straight line drawn through a given point in one of its sides.
Σελίδα 17 - PROBLEM. From two given points on the same side of a straight line given in position, draw two straight lines which shall meet in that line, and make equal angles with it ; also prove, that the sum of these two lines is less than the sum of any other two lines drawn to any other point in the line. Analysis. Let A, B be the two given points, and CD the given line. Suppose G the required point in the line, such that AG and BG being joined, the angle...
Σελίδα 29 - To describe a circle which shall pass through two given points and touch a given circle.
Σελίδα i - WILSON.— GEOMETRICAL DRAWING. For the use of Candidates for Army Examinations, and as an Introduction to Mechanical Drawing. By WN WILSON, MA Parts I. and II. Crown 8vo.
Σελίδα 75 - I • 1 inches. Draw a scale of miles to suit the map representing 40 miles. By the diagonal method make the scale to show furlongs. Write down the representative fraction, and show your calculations. 3. With a centre C and radius of 3 inches describe a sector of a circle ACB, having the angle at C equal to 60°. In the sector inscribe a square having two of its corners in the arc AB. 4. With a centre C and radius CB equal to 1 • 5 inches describe a circle and set off an angle BCA equal to 45°....
Σελίδα 51 - Tojind a fourth proportional to three given straight lines. Let A, B, C be the three given straight lines. It is required to find a fourth proportional to A, B, C. Take two straight lines DE, DF, containing any angle EDF: and upon these make DG equal to A, GE equal to B, and DH equal to C
Σελίδα 43 - CA; and from the centre A, at the distance AB, describe the circle BDE, in which, place * the straight line BD equal to AC, which is not greater than the diameter of the circle BDE; and join DA : the triangle ABD shall be such as is required; 11.2.