First book of mathematicsA. & C. Black, 1872 - 124 sider |
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Resultat 1-5 av 10
Side 13
... mark on it the circumference of the required circle . If carefully done , the pencil point will return exactly to the point from which it set out . We are then said to describe the circle from the point taken as centre , and with a ...
... mark on it the circumference of the required circle . If carefully done , the pencil point will return exactly to the point from which it set out . We are then said to describe the circle from the point taken as centre , and with a ...
Side 16
... mark off on the greater , from the sup- posed middle point , a part equal to the less . By the eye , divide the small remainder into two equal parts ; stretch out the compasses from the supposed middle of the line to the middle of the ...
... mark off on the greater , from the sup- posed middle point , a part equal to the less . By the eye , divide the small remainder into two equal parts ; stretch out the compasses from the supposed middle of the line to the middle of the ...
Side 23
... 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 the radius is equal to CA , or to the chord of 60 ° on the ...
... 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 the radius is equal to CA , or to the chord of 60 ° on the ...
Side 24
... Mark the chord of one , as from C to D ; then mark the chord of the other part , from D towards E , and draw a line from A to the point in the arc to which the latter chord extends . PARALLEL LINES . 25 Problem 12 . 88. To measure 24 ...
... Mark the chord of one , as from C to D ; then mark the chord of the other part , from D towards E , and draw a line from A to the point in the arc to which the latter chord extends . PARALLEL LINES . 25 Problem 12 . 88. To measure 24 ...
Side 57
... Mark off in AB , or in AB produced , a part AD or ad equal to the given line . Draw DE or de parallel to BC ; in the latter case , producing AC to meet de . The triangles ADE , Ade , are each similar to the tri- angle ABC ; and have the ...
... Mark off in AB , or in AB produced , a part AD or ad equal to the given line . Draw DE or de parallel to BC ; in the latter case , producing AC to meet de . The triangles ADE , Ade , are each similar to the tri- angle ABC ; and have the ...
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Vanlige uttrykk og setninger
20 feet ABCD acute angle adjacent angles adjacent sides algebra altitude angle equal angular points Ans.-1 acre arc cutting called central angle centre circumference contained denotes describe an arc diagonal divide divisor drawn equal angles equal sides equation equidistant equilateral triangle expressed extract the square ference Find the area Find the length foot formula geometrical truth given angle given line given point given square given straight line given triangle gonal hexagon hypotenuse inches inscribed line joining meet middle point multiply Nonagon Note number of degrees number of sides opposite angles opposite side parallel lines parallelogram pendicular perpendicular plane figure point of bisection poles produced proportion quadrilateral radius equal ratio rectangle rectilineal figure regular polygon rhombus right angles right-angled triangle rood rule sides equal square equal square feet square root square yards subtracted surface tangent trapezium trapezoid unknown quantity
Populære avsnitt
Side 5 - The circumference of every circle is supposed to be divided into...
Side 48 - UPON a given straight line to describe a segment of a circle containing an angle equal to a given rectilineal angle.
Side 3 - 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 39 - Parallelograms on the same base, and between the same parallels, are equal to one another.
Side 59 - 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 112 - 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 118 - Divide the area by . 7854 and extract the square root of the quotient.
Side 82 - 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 107 - 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 4 - It is a line every point of which is at the same distance from a point within it called the centre.