Elements of Geometry;: Containing the First Six Books of Euclid, with Two Books on the Geometry of Solids. To which are Added, Elements of Plane and Spherical TrigonometryBell & Bradfute, and G. G. & J. Robinson, London., 1795 - 400 Seiten |
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Seite xiv
... fides of a triangle are greater than the third , neither could it be true , that the great- er fide of every triangle is oppofite to the greater angle , nor that the equal fides are oppofite to equal angles , nor , laftly , that things ...
... fides of a triangle are greater than the third , neither could it be true , that the great- er fide of every triangle is oppofite to the greater angle , nor that the equal fides are oppofite to equal angles , nor , laftly , that things ...
Seite 4
... fides . XX . An isofceles triangle is that which has only two fides equal . AAA XXI . A fcalene triangle , is that which has three unequal fides , XXII . A right angled triangle , is that which has a right angle . XXIII . An obtuse ...
... fides . XX . An isofceles triangle is that which has only two fides equal . AAA XXI . A fcalene triangle , is that which has three unequal fides , XXII . A right angled triangle , is that which has a right angle . XXIII . An obtuse ...
Seite 5
... fides equal . XXVII . A rhombus , is that which has all its fides equal , but its angles are not right angles . XXVIII . A rhomboid , is that which has its oppofite fides equal to one another , but all its fides are not equal , nor its ...
... fides equal . XXVII . A rhombus , is that which has all its fides equal , but its angles are not right angles . XXVIII . A rhomboid , is that which has its oppofite fides equal to one another , but all its fides are not equal , nor its ...
Seite 10
... fides of the one equal to two fides of the other , each to each ; and have likewise the angles contained by those fides equal to one another ; their bases , or third fides , fhall be equal ; and the two triangles fhall be equal ; and ...
... fides of the one equal to two fides of the other , each to each ; and have likewise the angles contained by those fides equal to one another ; their bases , or third fides , fhall be equal ; and the two triangles fhall be equal ; and ...
Seite 11
... fides are oppofite , fhall be equal , each to each . Which was to be demonftrated . PROP . V. THEOR . THE HE angles at the base of an Ifofceles triangle are equal to one another ; and , if the equal fides be produced , the angles upon ...
... fides are oppofite , fhall be equal , each to each . Which was to be demonftrated . PROP . V. THEOR . THE HE angles at the base of an Ifofceles triangle are equal to one another ; and , if the equal fides be produced , the angles upon ...
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ABCD adjacent angles alfo alfo equal alſo angle ABC angle ACB angle BAC arch bafe baſe BC is equal becauſe the angle bifected Book VII cafe centre circle ABC circumference co-fine defcribed demonftrated diameter draw drawn equal angles equiangular equilateral equilateral polygon equimultiples Euclid exterior angle faid fame manner fame ratio fame reaſon fecond fection fegment femicircle fhewn fimilar fince firft firſt folid fore fquare of AC ftraight line AB fuch given ſtraight line greater impoffible infcribed interfection join lefs leſs Let ABC line BC magnitudes muſt oppofite angle parallel parallelepiped parallelogram perpendicular polygon prifm propofition proportionals radius rectangle contained rectilineal figure remaining angle right angles ſpace ſpherical triangle ſquare tangent thefe THEOR theſe thoſe touches the circle triangle ABC wherefore
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Seite 18 - 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. either the sides adjacent to the equal...
Seite 155 - 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.
Seite 17 - If, at a point in a straight line, two other straight lines upon the opposite sides of it, make the adjacent angles, together equal to two right angles, these two straight lines shall be in one and the same straight line.
Seite 9 - Wherefore, from the given point A, a straight line AL has been drawn equal to the given straight line BC.
Seite 3 - A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.
Seite 23 - Therefore all the angles of the figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Seite 12 - ABC: and it has also been proved that the angle FBC is equal to the angle GCB, which are the angles upon the other side of the base. Therefore the angles at the base, &c.
Seite 6 - Let it be granted that a straight line may be drawn from any one point to any other point.
Seite 156 - But by the hypothesis, it is less than a right angle ; which is absurd. Therefore the angles ABC, DEF are not unequal, that is, they are equal : And the angle at A is equal to the angle at D ; wherefore...
Seite 44 - 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...