Euclid's plane geometry, practically applied; book i, with explanatory notes, by H. Green |
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Side 11
4 grees in the arc of a circle , of which the centre is at the angular point , and the
arc cuts the lines forming the angle : thus the arc ec is the measure of the angle
EDC ; arc eg , of angle EDG , & c . A degree is the 360th part of the circumference
...
4 grees in the arc of a circle , of which the centre is at the angular point , and the
arc cuts the lines forming the angle : thus the arc ec is the measure of the angle
EDC ; arc eg , of angle EDG , & c . A degree is the 360th part of the circumference
...
Side 12
A circle ( circulus , a ring , or hoop ) , is a plano figure contained by one line ,
which is called the circumference ( circumferre , to carry round ) , and is such that
all straight lines drawn from a certain point within the figure to the circumference ...
A circle ( circulus , a ring , or hoop ) , is a plano figure contained by one line ,
which is called the circumference ( circumferre , to carry round ) , and is such that
all straight lines drawn from a certain point within the figure to the circumference ...
Side 13
In surveying , for the measurement of angles from any point to distant objects ,
several instruments have been constructed : as the Sextant , an arc of 60 degrees
; the Quadrant , an arc of 90 degrees ; and the Theodolite , a whole circle of 360 ...
In surveying , for the measurement of angles from any point to distant objects ,
several instruments have been constructed : as the Sextant , an arc of 60 degrees
; the Quadrant , an arc of 90 degrees ; and the Theodolite , a whole circle of 360 ...
Side 36
Take a circle , and draw a diameter DA ; bisect DA in C , and at C draw CB at rt ,
angles to DA , and produce BC to E ; - the circle will be divided into four
quadrants , each 90° . Let the arc AB of 909 be divided into arcs of 109 , 209 300
& c . , up ...
Take a circle , and draw a diameter DA ; bisect DA in C , and at C draw CB at rt ,
angles to DA , and produce BC to E ; - the circle will be divided into four
quadrants , each 90° . Let the arc AB of 909 be divided into arcs of 109 , 209 300
& c . , up ...
Side 61
2 , bk . xii . , “ that circles are to one another as the squares of their diameters . ...
until it cuts AE : the equare on BE will be double of the square on AB , and the
circle of which BE is the diameter double of the circie of which AB is the diameter
.
2 , bk . xii . , “ that circles are to one another as the squares of their diameters . ...
until it cuts AE : the equare on BE will be double of the square on AB , and the
circle of which BE is the diameter double of the circie of which AB is the diameter
.
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Vanlige uttrykk og setninger
ABCD added angle equal apply ascertain assumed Axioms base base BC bisected centre circle circumference coincide common Conc construct contained definition demonstration describe diagonal diameter distance divided draw drawn earth's equal Euclid extremity fall feet figure four Geometry given given point greater half height impossible inches inference intersect join length less line BC measure meet miles named object opposite parallel parallelogram perpendicular plane practical principle produced Prop proposition proved reason rectangle rectil rectilineal representative right angles scale sides square straight line suppose surface thing third triangle true truth units Wherefore whole
Populære avsnitt
Side 36 - If two triangles have two angles of the one equal to two angles of the other, each to each, and also one side of the one equal to the corresponding side of the other, the triangles are congruent.
Side 17 - If a straight line meets two straight lines, so as to make the two interior angles on the same side of it taken together less than two right angles...
Side 17 - Things which are equal to the same thing are equal to one another. 2. If equals be added to equals, the wholes are equal. 3. If equals be taken from equals, the remainders are equal. 4. If equals be added to unequals, the wholes are unequal. 5. If equals be taken from unequals, the remainders are unequal. 6. Things which are double of the same are equal to one another.
Side 41 - We assume that but one straight line can be drawn through a given point parallel to a given straight line.
Side 13 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Side 16 - LET it be granted that a straight line may be drawn from any one point to any other point.
Side 54 - To a given straight line to apply a parallelogram, which shall be equal to a given triangle, and have one of its angles equal to a given rectilineal angle.
Side 21 - If two angles of a triangle be equal to one another, the sides also which subtend, or are opposite to, the equal angles, shall be equal to one another.
Side 22 - Upon the same base, and on the same side of it, there cannot be two triangles that have their sides which are terminated in one extremity of the base, equal to one another, and likewise those which are terminated in the other extremity.
Side 12 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Bibliografisk informasjon
| Tittel | Euclid's plane geometry, practically applied; book i, with explanatory notes, by H. Green |
| Forfatter | Euclides |
| Redaktør | Henry Green |
| distribuert | 1863 |
| Original fra | Oxford University |
| Digitalisert | 14. nov 2006 |
| Eksporter sitat | BiBTeX EndNote RefMan |