An Elementary Treatise on the Geometrical and Algebraical Investigation of Maxima and Minima: Being the Substance of a Course of Lectures Delivered Conformably to the Will of Lady Sadler : to which is Added A Selection of Propositions Deducible from Euclid's Elements |
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Page 19
... extremities of the base of a given triangle , two straight lines be drawn , both above the base , and each of them equal to the adjacent side , and making with it an angle equal to the vertical angle of the triangle ; then , if two ...
... extremities of the base of a given triangle , two straight lines be drawn , both above the base , and each of them equal to the adjacent side , and making with it an angle equal to the vertical angle of the triangle ; then , if two ...
Page 25
... extremities of either pair of opposite sides , are , together , half of the parallelogram . ( LXV . ) If two sides of a trapezium be parallel , the tri- angle contained by either of the other sides , and the two straight lines drawn ...
... extremities of either pair of opposite sides , are , together , half of the parallelogram . ( LXV . ) If two sides of a trapezium be parallel , the tri- angle contained by either of the other sides , and the two straight lines drawn ...
Page 26
... extremities to the bisection of the opposite side , is the half of the trapezium . ( LXVI . ) The triangle contained by the straight lines join- ing the points of the bisection of the three sides of a given triangle , is one - fourth ...
... extremities to the bisection of the opposite side , is the half of the trapezium . ( LXVI . ) The triangle contained by the straight lines join- ing the points of the bisection of the three sides of a given triangle , is one - fourth ...
Page 36
... extremity of the base . ( XIV . ) If from any point , in the circumference of the greater of two given concentric circles , two straight lines be drawn to the extremities of any diameter of the less , their squares shall be , together ...
... extremity of the base . ( XIV . ) If from any point , in the circumference of the greater of two given concentric circles , two straight lines be drawn to the extremities of any diameter of the less , their squares shall be , together ...
Page 39
... extremity , the two circles shall touch one another . ( VII . ) To draw a tangent to a circle , which shall bẹ parallel to a given finite straight line . COR . Hence , to draw a tangent to a circle , which shall make , with a given ...
... extremity , the two circles shall touch one another . ( VII . ) To draw a tangent to a circle , which shall bẹ parallel to a given finite straight line . COR . Hence , to draw a tangent to a circle , which shall make , with a given ...
Other editions - View all
An Elementary Treatise on the Geometrical and Algebraical Investigation of ... Daniel Cresswell No preview available - 2016 |
An Elementary Treatise on the Geometrical and Algebraical Investigation of ... D. Cresswell No preview available - 2015 |
An Elementary Treatise on the Geometrical and Algebraical Investigation of ... D 1776-1844 Cresswell No preview available - 2015 |
Common terms and phrases
ABCD aggregate Algebra altitude angle equal apparent magnitude base Binomial Theorem bisected chord circumference coefficients Cx² derivative describe a circle diameter divided double draw a straight equal perimeter equation equilateral triangle Euclid Euclid's Elements find a point finite straight line function Geometry given angle given circle given finite straight given point given ratio given straight line given triangle greater ratio greatest hypotenuse inscribed isosceles triangle less Let ABC lines be drawn magnitudes MAXIMA AND MINIMA maximum minimum number of sides parallel parallelepiped parallelogram plane prism produced PROP proposition quadrilateral rectilineal figure rectangle contained regular polygon rhomb right angles right-angled triangle scalene triangle SCHOLIUM sector segment shewn square straight line drawn straight line joining subtended tangent Theorem trapezium triangle ABC variable quantity velocity vertex vertical angle wherefore
Popular passages
Page 81 - If two triangles have one angle of the one equal to one angle of the other and the sides about these equal angles proportional, the triangles are similar.
Page 83 - The areas of two triangles which have an angle of the one equal to an angle of the other are to each other as the products of the sides including the equal angles. D c A' D' Hyp. In triangles ABC and A'B'C', ZA = ZA'. To prove AABC = ABxAC. A A'B'C' A'B'xA'C' Proof. Draw the altitudes BD and B'D'.
Page 56 - If a straight line be bisected, and produced to any point ; the rectangle contained by the whole line thus produced, and the part of it produced, together with the square...
Page 36 - In every triangle, the square of the side subtending any of the acute angles is less than the squares of the sides containing that angle by twice the rectangle contained by either of these sides, and the straight line intercepted between the perpendicular let fall upon it from the opposite angle, and the acute angle. Let ABC be any triangle, and the angle at B one of its acute angles, and upon BC, one of the sides containing it, let fall the perpendicular...
Page 32 - If there be two straight lines, one of which is divided into any number of parts, the rectangle contained by the two straight lines is equal to the rectangles contained by the undivided line, and the several parts of the divided line.
Page 85 - Divide a straight line into two parts such that the rectangle contained by the whole line and one of the parts shall be equal to the square on the other part.
Page 12 - If two triangles have the three angles of one equal to the three angles of the other, each to each, do you think the two triangles are necessarily alike in every respect ? 5.
Page 16 - If two triangles have two angles of the one equal to two angles of the other, each to each, and one side equal to one side, viz.
Page 154 - Iff a straight line be divided into any two parts, four times the rectangle contained by the whole line, and one of the parts, together with the square of the other part, is equal to the square of the straight line which is made up of the whole and that part.
Page 22 - If from the right angle of a right-angled triangle, two straight lines be drawn, one perpendicular to the base, and the other bisecting it, they will contain an angle equal to the difference of the two acute angles of the triangle.