A course of practical geometry for mechanics1856 |
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Página 37
... inch . Bisect each of the four circumferences , formed in the construction . Join these points of bisection , when a square will be inscribed in the circle , having its sides respectively parallel to the ... 14 inches PRACTICAL GEOMETRY . 37.
... inch . Bisect each of the four circumferences , formed in the construction . Join these points of bisection , when a square will be inscribed in the circle , having its sides respectively parallel to the ... 14 inches PRACTICAL GEOMETRY . 37.
Página 38
William Pease J A Pease. EXAMPLE . Make a square having each side 14 inches , and describe one circle about , and inscribe another in it . PROBLEM XXXIII . To trisect a right angle , that is , to divide it into three equal parts . Let ...
William Pease J A Pease. EXAMPLE . Make a square having each side 14 inches , and describe one circle about , and inscribe another in it . PROBLEM XXXIII . To trisect a right angle , that is , to divide it into three equal parts . Let ...
Página 39
... inches long , describe an isosceles triangle , with its vertical angle containing 127 degrees . 2. On a base of 14 inches , describe an isosceles tri- angle , having its vertical angle 45 degrees . Bisect this angle by a line meeting ...
... inches long , describe an isosceles triangle , with its vertical angle containing 127 degrees . 2. On a base of 14 inches , describe an isosceles tri- angle , having its vertical angle 45 degrees . Bisect this angle by a line meeting ...
Página 42
... 14 inches long . 2. On a straight line inch long , describe a regular pentagon . ANOTHER METHOD . 1. Find the angle at the centre of the polygon , ( see Def . 66 , ) by dividing 360 ° by the number of sides , the quotient being the ...
... 14 inches long . 2. On a straight line inch long , describe a regular pentagon . ANOTHER METHOD . 1. Find the angle at the centre of the polygon , ( see Def . 66 , ) by dividing 360 ° by the number of sides , the quotient being the ...
Página 45
... inches , inscribe a regular undecagon . 3. In a circle of 14 inches radius , inscribe a regular dodecagon . ( Apply Prob . XXXIII . in the construction . ) PROBLEM XLIV . To inscribe a regular pentagon in a given circle . Let A B C D be ...
... inches , inscribe a regular undecagon . 3. In a circle of 14 inches radius , inscribe a regular dodecagon . ( Apply Prob . XXXIII . in the construction . ) PROBLEM XLIV . To inscribe a regular pentagon in a given circle . Let A B C D be ...
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Términos y frases comunes
13 inches A B C A C B Aldersgate Street altitude angle equal arc or angle Arithmetical mean Bisect Book centre circumference contain an angle cutting A B describe a circle describe a regular describe an arc diagonal scale distance Divide a line Draw a line Draw chords Draw the line ellipse equilateral triangle Euclid Euclid's Elements EXAMPLES French FRENCH LANGUAGE Geometry given angle given circle given line given parallelogram given point given square given straight line given triangle Harmonical mean heptagon inch side inches long inches radius inches respectively inscribe isosceles triangle Join Let A B line 2 inches line A B number of degrees number of equal parallel parallel ruler perpendicular plain scale plane Prob PROBLEM produced Prop protractor pupil radii rectangle rectilineal figure regular pentagon regular polygon Relfe rhombus right angles right line right-angled triangle scale of chords segment square equal triangle required vertex vertical angle
Pasajes populares
Página 8 - 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.
Página 8 - 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.
Página 7 - 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.
Página 68 - In any right-angled triangle, the square which is described upon the side subtending the right angle, is equal to the squares described upon the sides which contain the right angle.
Página 14 - An angle in a segment is the angle contained by two straight lines drawn from any point in the circumference of the segment to the extremities of the straight . line which is the base of the segment.
Página 9 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Página 11 - Parallel straight lines are such as are in the same plane, and which being produced ever so far both ways, do not meet.
Página 7 - ... straight lines, and the other upon the other line : Thus the angle which is contained by the straight lines, AB, CB, is named the angle ABC, or CBA ; that which is contained by AB...