First book of mathematicsA. & C. Black, 1872 - 124 σελίδες |
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Σελίδα 21
... square or triangle , the limbs of which are set at right angles to each other ; and by the flat ruler . The latter has usu- ally a line across it , at right angles to the edges . If this line be carefully laid over the line to which a ...
... square or triangle , the limbs of which are set at right angles to each other ; and by the flat ruler . The latter has usu- ally a line across it , at right angles to the edges . If this line be carefully laid over the line to which a ...
Σελίδα 26
... Square , " or " Triangle , " used to draw a right angle . If , from B , GB were drawn perpendicular to AB , a perpendicular to GB at G would be parallel to AB . THE TRIANGLES . 27 DEFINITIONS - SECOND SERIES . Rectilineal 26 FIRST BOOK ...
... Square , " or " Triangle , " used to draw a right angle . If , from B , GB were drawn perpendicular to AB , a perpendicular to GB at G would be parallel to AB . THE TRIANGLES . 27 DEFINITIONS - SECOND SERIES . Rectilineal 26 FIRST BOOK ...
Σελίδα 29
... square , the rectangle , the rhombus , the rhomboid . IIO . A SQUARE is a parallelogram having all its sides equal , and all its angles right angles . EFGH is a square . A square is spoken of as the square of any of its sides . The ...
... square , the rectangle , the rhombus , the rhomboid . IIO . A SQUARE is a parallelogram having all its sides equal , and all its angles right angles . EFGH is a square . A square is spoken of as the square of any of its sides . The ...
Σελίδα 33
... , a rhomboid , a square , a rectangle . In the four last , if two adjacent sides are known , all four sides are known , as in every parallelogram the opposite sides are equal . C - Example . To form a rectangle , the sides.
... , a rhomboid , a square , a rectangle . In the four last , if two adjacent sides are known , all four sides are known , as in every parallelogram the opposite sides are equal . C - Example . To form a rectangle , the sides.
Σελίδα 34
... square required . The perpendicular will be the other diagonal . Note . From this it will be seen that the diagonals of a square are equal , and intersect each other at right angles . Problem 19 . 128. To construct a triangle when one ...
... square required . The perpendicular will be the other diagonal . Note . From this it will be seen that the diagonals of a square are equal , and intersect each other at right angles . Problem 19 . 128. To construct a triangle when one ...
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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.