First book of mathematicsA. & C. Black, 1872 - 124 σελίδες |
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Σελίδα 4
... equal in length . 23. A RADIUS ( plural , radii ) is any straight line from the centre of a circle to the circumference ; as , the lines just named . 24. All radii of the same circle are equal in length . 25. AN ARC of a circle is any ...
... equal in length . 23. A RADIUS ( plural , radii ) is any straight line from the centre of a circle to the circumference ; as , the lines just named . 24. All radii of the same circle are equal in length . 25. AN ARC of a circle is any ...
Σελίδα 5
... equal in all respects ; all their radii are equal ; their diameters are equal ; their circumferences are equal ; and their areas are equal . The two circles are identical , and one could be laid upon the other , so that the two centres ...
... equal in all respects ; all their radii are equal ; their diameters are equal ; their circumferences are equal ; and their areas are equal . The two circles are identical , and one could be laid upon the other , so that the two centres ...
Σελίδα 8
... equal to the sum of the two angles GED , DEH . If we take the angle HEF from the angle DEF , the angle DEH is left ; or the angle DEH is the difference between the angles DEF , HEF . Angles can also be measured , and have their magni ...
... equal to the sum of the two angles GED , DEH . If we take the angle HEF from the angle DEF , the angle DEH is left ; or the angle DEH is the difference between the angles DEF , HEF . Angles can also be measured , and have their magni ...
Σελίδα 9
... equal circles , equal arcs are opposite to or subtend equal angles . 47. The magnitude of the circle makes no difference as to its use in the measurement of angles . An angle is the same whether its sides are long or short ; the arc on ...
... equal circles , equal arcs are opposite to or subtend equal angles . 47. The magnitude of the circle makes no difference as to its use in the measurement of angles . An angle is the same whether its sides are long or short ; the arc on ...
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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
Δημοφιλή αποσπάσματα
Σελίδα 5 - The circumference of every circle is supposed to be divided into...
Σελίδα 48 - UPON a given straight line to describe a segment of a circle containing an angle equal to a given rectilineal angle.
Σελίδα 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.
Σελίδα 39 - Parallelograms on the same base, and between the same parallels, are equal to one another.
Σελίδα 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.
Σελίδα 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.
Σελίδα 118 - Divide the area by . 7854 and extract the square root of the quotient.
Σελίδα 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.
Σελίδα 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.
Σελίδα 4 - It is a line every point of which is at the same distance from a point within it called the centre.