The Elements of Euclid; viz. the first six books, together with the eleventh and twelfth. Also the book of Euclid's Data. By R. Simson. To which is added, A treatise on the construction of the trigonometrical canon [by J. Christison] and A concise account of logarithms [by A. Robertson].1834 |
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Página 7
... less . Let AB and C be the two given straight lines , whereof AB is the greater ; it is required to cut off from AB , the greater , a part equal to C , the less . 2. 1 . From the point A , draw the straight line AD equal to C ; and from ...
... less . Let AB and C be the two given straight lines , whereof AB is the greater ; it is required to cut off from AB , the greater , a part equal to C , the less . 2. 1 . From the point A , draw the straight line AD equal to C ; and from ...
Página 10
... less , and join DC : therefore , because in the triangles DBC , ACB , DB is equal to AC , and BC common to both , the two sides DB , BC are equal to the two AC , CB , each to each ; and the angie DBC is equal to the angle + ACB ...
... less , and join DC : therefore , because in the triangles DBC , ACB , DB is equal to AC , and BC common to both , the two sides DB , BC are equal to the two AC , CB , each to each ; and the angie DBC is equal to the angle + ACB ...
Página 17
... less than two right angles . Let ABC be any triangle : any two of its angles together shall be less than two right angles . * 16. 1 . B † 4 Ax . Produce BC to D : and because ACD is the exterior angle of the triangle ABC , ACD is ...
... less than two right angles . Let ABC be any triangle : any two of its angles together shall be less than two right angles . * 16. 1 . B † 4 Ax . Produce BC to D : and because ACD is the exterior angle of the triangle ABC , ACD is ...
Página 18
... less , because then , the angle ABC would be less than the angle ACB ; but it is not ; therefore the side AC is not B less than AB : and it has been shewn that it is not equal to AB : therefore AC is greater than AB . Wherefore , the ...
... less , because then , the angle ABC would be less than the angle ACB ; but it is not ; therefore the side AC is not B less than AB : and it has been shewn that it is not equal to AB : therefore AC is greater than AB . Wherefore , the ...
Página 22
... less , because then , the base BC would be less than the base EF ; but it is t not ; therefore the angle BAC is not less than the angle EDF : and it was shewn , that it is not equal to it ; therefore the angle BAC is greater than the ...
... less , because then , the base BC would be less than the base EF ; but it is t not ; therefore the angle BAC is not less than the angle EDF : and it was shewn , that it is not equal to it ; therefore the angle BAC is greater than the ...
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Términos y frases comunes
ABC is given AC is equal altitude angle ABC angle BAC base BC bisected centre circle ABCD circle EFGH circumference common logarithm cone Constr cylinder demonstrated described diameter draw drawn equal angles equiangular equimultiples Euclid ex æquali excess fore given angle given in magnitude given in position given in species given magnitude given ratio given straight line gnomon greater join less Let ABC logarithm multiple parallel parallelogram perpendicular point F polygon prism Prop proportionals Q. E. D. PROPOSITION radius ratio of AE rectangle CB rectangle contained rectilineal figure remaining angle right angles segment shewn sides BA similar sine solid angle solid parallelopiped square of AC straight line AB straight line BC tangent THEOR.-If tiple triangle ABC vertex wherefore
Pasajes populares
Página 32 - 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...
Página 138 - 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.
Página 39 - If a straight line be divided into any two parts, the rectangle contained by the whole and one of the parts, is equal to the rectangle contained by the two parts, together with the square of the aforesaid part.
Página 22 - If a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another...
Página 41 - 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 on half the line bisected, is equal to the square on the straight line which is made up of the half and the part produced.
Página 5 - If two triangles have two sides of the one equal to two sides of the other, each to each, but the...
Página 38 - IF a straight line be divided into any two parts, the rectangles contained by the whole and each of the parts, are together equal to the square of the whole line. Let the straight line AB be divided...
Página 262 - Again ; the mathematical postulate, that " things which are equal to the same are equal to one another," is similar to the form of the syllogism in logic, which unites things agreeing in the middle term.
Página 89 - PBOR. —To describe an isosceles triangle, having each of the angles at the base, double of the third angle. Take any straight...
Página 165 - Wherefore, in equal circles &c. QED PROPOSITION B. THEOREM If the vertical angle of a triangle be bisected by a straight line which likewise cuts the base, the rectangle contained by the sides of the triangle is equal to the rectangle contained by the segments of the base, together with the square on the straight line which bisects the angle.