First book of mathematicsA. & C. Black, 1872 - 124 σελίδες |
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Σελίδα 27
... base ; the angular point opposite to the base is then called the vertex of the triangle : the angle there is called the vertical angle . 97. The ALTITUDE , or height of a triangle , is the per- pendicular from one angular point on the ...
... base ; the angular point opposite to the base is then called the vertex of the triangle : the angle there is called the vertical angle . 97. The ALTITUDE , or height of a triangle , is the per- pendicular from one angular point on the ...
Σελίδα 28
... base AC being produced . The distances from the perpendicular to the ends of the base are called the segments of the base ; that is , DA and DC in both figures . Varieties of Triangles . 98. AN ACUTE ANGLED TRIANGLE has all its angles ...
... base AC being produced . The distances from the perpendicular to the ends of the base are called the segments of the base ; that is , DA and DC in both figures . Varieties of Triangles . 98. AN ACUTE ANGLED TRIANGLE has all its angles ...
Σελίδα 30
... base , or on the base produced , from any point in the opposite side . It expresses the dis- tance between these sides . 116. In rectangles , if any side be taken as base , the adjacent side is the altitude , being a perpendicular from ...
... base , or on the base produced , from any point in the opposite side . It expresses the dis- tance between these sides . 116. In rectangles , if any side be taken as base , the adjacent side is the altitude , being a perpendicular from ...
Σελίδα 32
... base , instead of C. 121. Corollary . * From the preceding Problem , it is obvious how- To find a point ( F ) at any given distances ( A and B ) from two given points ( D and E ) , provided that the sum of the given distances is greater ...
... base , instead of C. 121. Corollary . * From the preceding Problem , it is obvious how- To find a point ( F ) at any given distances ( A and B ) from two given points ( D and E ) , provided that the sum of the given distances is greater ...
Σελίδα 35
... base and perpendicular are given ; as , AC and CB ( fig . 33 ) . This is a case of Problem 16 . 132. 2. When the base ( or perpendicular ) and an acute angle are given . ( 1. ) When the given side is between the two given angles ( right ...
... base and perpendicular are given ; as , AC and CB ( fig . 33 ) . This is a case of Problem 16 . 132. 2. When the base ( or perpendicular ) and an acute angle are given . ( 1. ) When the given side is between the two given angles ( right ...
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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.