First book of mathematicsA. & C. Black, 1872 - 124 sider |
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Side 5
... Division of the Circumference . 34. The circumference of a circle is supposed to be divided into 360 equal parts , called degrees , and marked ° . Each degree is divided into 60 equal parts , called minutes , and marked ' . Each minute ...
... Division of the Circumference . 34. The circumference of a circle is supposed to be divided into 360 equal parts , called degrees , and marked ° . Each degree is divided into 60 equal parts , called minutes , and marked ' . Each minute ...
Side 23
... division of the arc , describe arcs cutting the chord AB ; and mark on the line AB the number of degrees taken as radius for each arc that cuts it . The chord AB will then be a scale of chords , or line of chords , for a circle of which ...
... division of the arc , describe arcs cutting the chord AB ; and mark on the line AB the number of degrees taken as radius for each arc that cuts it . The chord AB will then be a scale of chords , or line of chords , for a circle of which ...
Side 51
... done in a simpler manner , but requiring a greater number of lines to be drawn parallel to each other . Lay off five equal parts on any line , AF , making an angle with AB , -namely , A 1 , 1-2 DIVISION OF A LINE . 51.
... done in a simpler manner , but requiring a greater number of lines to be drawn parallel to each other . Lay off five equal parts on any line , AF , making an angle with AB , -namely , A 1 , 1-2 DIVISION OF A LINE . 51.
Side 52
... division , draw lines parallel to BF . These will divide AB into five equal parts . 176. Note . - This illustrates the geometrical truth , that- Parallel lines cut diverging lines in the same pro- portion . The points , 1 , 2 , 3 , 4 ...
... division , draw lines parallel to BF . These will divide AB into five equal parts . 176. Note . - This illustrates the geometrical truth , that- Parallel lines cut diverging lines in the same pro- portion . The points , 1 , 2 , 3 , 4 ...
Side 55
... division of CD , producing them to meet AB . They will divide AB similarly to CD . A FIG . 50 B 184. Note . - As parallel lines cut diverging lines proportionally ; so , also , diverging lines cut parallel DIVISION OF A LINE . 55.
... division of CD , producing them to meet AB . They will divide AB similarly to CD . A FIG . 50 B 184. Note . - As parallel lines cut diverging lines proportionally ; so , also , diverging lines cut parallel DIVISION OF A LINE . 55.
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Vanlige uttrykk og setninger
ABCD acres acute angle added altitude angle equal angular points base Bisect called centre chord circle circumference construct contained denotes diagonal diameter difference distance divide divisor draw drawn edge ends equal equal angles equation equidistant Examples Exercises expressed extract feet field figure Find the area foot formula four geometrical given angle given line given point given straight line given triangle gives half hypotenuse inches inscribed Join known length less letters mark means measure meet multiply Note number of degrees opposite side parallel parallel lines parallelogram perpendicular placed plane poles preceding Problem produced proportion quadrilateral quantity radius ratio rectangle regular polygon respects right angles right-angled triangle rood round rule sides similar square square root stands straight line subtracted surface taken term third usually whole yards
Populære avsnitt
Side 7 - The circumference of every circle is supposed to be divided into...
Side 50 - UPON a given straight line to describe a segment of a circle containing an angle equal to a given rectilineal angle.
Side 5 - 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.
Side 41 - Parallelograms on the same base, and between the same parallels, are equal to one another.
Side 61 - Quadrilateral ; of five sides a Pentagon ; of six sides a Hexagon ; of seven sides a Heptagon ; of eight sides an Octagon ; of nine sides a Nonagon ; of ten sides a Decagon ; of twelve sides a Dodecagon.
Side 114 - Polygons are those which have more than four sides. They receive particular names from the number of their sides ; thus a pentagon has five sides, a hexagon has six sides, a heptagon seven, an octagon eight, a nonagon nine, a decagon ten, an undecagon eleven, and a dodecagon has twelve sides.
Side 120 - Divide the area by . 7854 and extract the square root of the quotient.
Side 84 - To rearrange an equation you can • add the same quantity to both sides • subtract the same quantity from both sides • multiply both sides by the same quantity • divide both sides by the same quantity.
Side 109 - Find the area of a field in the form of a trapezoid whose altitude is 120 m and whose parallel sides are 130 m and 180 m.
Side 6 - It is a line every point of which is at the same distance from a point within it called the centre.