Inventional Geometry: A Series of Problems : Intended to Familiarize the Pupil with Geometrical Conceptions, and to Exercise His Inventive FacultyAmerican Book Company, 1876 - 97 páginas |
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Página 54
... line joining the extremities of that arc . 216. With the assistance of a semicircular protractor , can you contrive to place on one line the chords of all the degrees from 1 ° to 90 ° ? or , in other words , can you make a line of ...
... line joining the extremities of that arc . 216. With the assistance of a semicircular protractor , can you contrive to place on one line the chords of all the degrees from 1 ° to 90 ° ? or , in other words , can you make a line of ...
Página 55
... line of chords . 218. Say which chord is equal to the radius of the line of chords . 219. Make , by the line of chords , angles of 26 ° , 32 ° , 75 ° , and prove , by the protractor , whether they are correct or not . 220. How , by the ...
... line of chords . 218. Say which chord is equal to the radius of the line of chords . 219. Make , by the line of chords , angles of 26 ° , 32 ° , 75 ° , and prove , by the protractor , whether they are correct or not . 220. How , by the ...
Página 61
... lines joining the centre of a polygon with the extremities of one of its sides is called the angle at the centre of the ... line of chords the angle at the centre and the angle of the octagon , and prove the correct- ness of your work by ...
... lines joining the centre of a polygon with the extremities of one of its sides is called the angle at the centre of the ... line of chords the angle at the centre and the angle of the octagon , and prove the correct- ness of your work by ...
Página 71
... line of sines , and cal- culate the area . 310. Show by a figure what the area of a rectangle is , whose length is 23 and breadth 13 , and prove it by calculation . 311. Given , from a line of chords , the chord of 90 ° , it is required ...
... line of sines , and cal- culate the area . 310. Show by a figure what the area of a rectangle is , whose length is 23 and breadth 13 , and prove it by calculation . 311. Given , from a line of chords , the chord of 90 ° , it is required ...
Página 76
... line of chords ? 341. Reduce an irregular hexagon with a re- entrant angle to a triangle . 342. Reduce an irregular octagon with two reëntrant angles to a triangle . 25 125 It has been agreed upon by arithmeticians that fractions whose ...
... line of chords ? 341. Reduce an irregular hexagon with a re- entrant angle to a triangle . 342. Reduce an irregular octagon with two reëntrant angles to a triangle . 25 125 It has been agreed upon by arithmeticians that fractions whose ...
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Términos y frases comunes
adjacent angles AMERICAN BOOK COMPANY angular points arc is called arithmetic arithmetic mean arrange the surfaces BALFOUR STEWART Barnes's Brief History base boundaries breadth card a hollow cents circumference Cloth construct cube curve diameter dimensions divide a circle divide a line divide an equilateral dodecagon duodecimals EDWARD EGGLESTON ellipse equal and similar equal sectors equilateral triangle find the area four equal FRANKLIN TAYLOR geometry Give a plan give a sketch gles HERBERT SPENCER hexahedron icosahedron illustrated Inventional Geometry isosceles triangle length line drawn line of chords line of sines line of tangents nonagon number of degrees octagon octahedron pentagon perpendicular piece of card place a circle place a hexagon place a square polygon protractor pupil pyramid quadrant quadrilaterals radii radius ratio rectangle reëntrant angle rhomboid rhombus right angle right-angled triangle secant sides is called solid square inches takes the name tetrahedron Thalheimer's touch trapezium versed sine write its name zoid
Pasajes populares
Página 41 - TRIANGLES upon the same base, and between the same parallels, are equal to one another.
Página 21 - All arcs of circles that are not so great as a semi-circumference are called less arcs. A line that joins the extremities of an arc is called the chord of that arc. When two radii connect together any two points in the circumference of a circle which are on exactly the opposite sides of the centre, they make a chord, which is called the diameter of the circle, and such diameter divides the circle into two equal segments, 1 which take the name of semicircles.