The Elements of geometry [Euclid book 1-3] in general terms, with notes &c. &c. Also a variety of problems & theorems. [Ed. by J. Luby. With] The elements of plane geometry, comprising the definitions of the fifth book, and the sixth book in general terms, with notes [&c.] by J. Luby [described as] Pt. 31821 |
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Resultat 1-5 av 42
Side 3
... PROPOSITION 1 , PROB . On a given finite right line to construct an equilateral triangle . With the extremities of the given line as centres and the given line as radius describe two circles , ( per post . 3. ) ; from a point in which ...
... PROPOSITION 1 , PROB . On a given finite right line to construct an equilateral triangle . With the extremities of the given line as centres and the given line as radius describe two circles , ( per post . 3. ) ; from a point in which ...
Side 20
... proposition may be demonstrated precisely as the former , ( from the 38th . ) PROP . 41 , THEOR . If a parellogram and a triangle have the same base and are between the same parallels the parallelogram is double of the triangle . For by ...
... proposition may be demonstrated precisely as the former , ( from the 38th . ) PROP . 41 , THEOR . If a parellogram and a triangle have the same base and are between the same parallels the parallelogram is double of the triangle . For by ...
Side 26
... proposition is made use of only in proving the eight . It does not follow from this prop . that there cannot be on the same base two triangles whose legs are respectively = ; but the ⇒ legs must not be conterminous , — 4th . The eighth ...
... proposition is made use of only in proving the eight . It does not follow from this prop . that there cannot be on the same base two triangles whose legs are respectively = ; but the ⇒ legs must not be conterminous , — 4th . The eighth ...
Side 54
... proposition fifty - nine of those deducibles , in what case will the right line ( AD ) connecting the vertices be parallel to the base . Fig . 49 , ANALYSIS . Suppose AD is parallel to BG , then the angle ADB is to the angle DBC and ...
... proposition fifty - nine of those deducibles , in what case will the right line ( AD ) connecting the vertices be parallel to the base . Fig . 49 , ANALYSIS . Suppose AD is parallel to BG , then the angle ADB is to the angle DBC and ...
Side 55
... proposition fifty - nine , when will the figure [ ABCD ] be a parallelogram . Fig . 49 . ANALYSIS . Because ABCD is a parallelogram , AD is to BC , ( by prop . 34. 1. Elr . ) it is also to AC and to AB , ( by the proof of foregoing prop ...
... proposition fifty - nine , when will the figure [ ABCD ] be a parallelogram . Fig . 49 . ANALYSIS . Because ABCD is a parallelogram , AD is to BC , ( by prop . 34. 1. Elr . ) it is also to AC and to AB , ( by the proof of foregoing prop ...
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The Elements of geometry [Euclid book 1-3] in general terms, with notes &c ... Euclides Uten tilgangsbegrensning - 1833 |
Vanlige uttrykk og setninger
adjacent ANALYSIS angle ABC angle contained arches bisecting line chord circumference connecting line conterminous dedu describe a circle diagonal diameter directum divided draw a right drawn line equiangular equilateral triangle evident external angle extremity given angle given circle given in position given line given point given ratio given right line given side gonal half the given hypothenuse inscribed intercept intersect isosceles triangle less lesser let fall line bisecting lines be drawn magnitude mean proportional meet middle point opposite angle opposite side parallelogram pass pendicular perpen perpendicular point of bisection point of contact point of section polygons PORISMS PROB PROP radii radius rect rectangle required triangle right angled triangle right line drawn segts semicircle semiperimeter side subtending square Suppose tangent THEOR triangle ABC vertex vertical angle whole line
Populære avsnitt
Side 128 - The angle at the centre of a circle is double the angle at the circumference on the same arc.
Side 26 - IF three straight lines be proportionals, the rectangle contained by the extremes is equal to the square of the mean ; and if the rectangle contained by the extremes be equal to the square of the mean, the three straight lines are proportionals.
Side 111 - In any triangle, the square of the side subtending an acute angle is less than the sum of the squares of the...
Side 4 - A straight line is said to be cut in extreme and mean ratio, when the whole is to the greater segment as the greater segment is to the less.
Side 98 - If a straight line be divided into any two parts, the square of the whole line is equal to the squares of the two parts, together with twice the rectangle contained by the parts.
Side 2 - Convertendo ; when it is .concluded, that if there be four magnitudes proportional, the first is to the sum or difference of the first and second, as the third is to the sum or difference of the third and fourth.
Side 20 - DE : but equal triangles on the same base and on the same side of it, are between the same parallels ; (i.
Side 116 - If any two points be taken in the circumference of a circle, the straight line which joins them shall fall within the circle.
Side 156 - The sum of the squares of the sides of any quadrilateral is equal to the sum of the squares of the diagonals plus four times the square of the line joining the middle points of the diagonals.
Side 28 - Similar triangles are to one another in the duplicate ratio of their homologous sides.