Euclid's Elements of Geometry: From the Latin Translation of Commandine, to which is Added, a Treatise of the Nature and Arithmetic of Logarithms ; Likewise Another of the Elements of Plane and Spherical Trigonometry ; with a Preface ...W. Strahan, 1782 - 399 σελίδες |
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Σελίδα
... greater ; but fometimes one lefs , and the other greater , as in the two laft - mentioned Cafes . When it is not doubtful , the Qua- fitum is fometimes greater than 90 Degrees , and fometimes fitum Mr. CUNN'S PREFACE .
... greater ; but fometimes one lefs , and the other greater , as in the two laft - mentioned Cafes . When it is not doubtful , the Qua- fitum is fometimes greater than 90 Degrees , and fometimes fitum Mr. CUNN'S PREFACE .
Σελίδα 6
... greater whereof is A B ; it is required to cut off a Line from the greater A B equal to the leffer C. * Put a Right Line AD at the Point A , equal to the Line C ; and about the Centre A , with the Dif tance AD , defcribe a Circle D E F ...
... greater whereof is A B ; it is required to cut off a Line from the greater A B equal to the leffer C. * Put a Right Line AD at the Point A , equal to the Line C ; and about the Centre A , with the Dif tance AD , defcribe a Circle D E F ...
Σελίδα 10
... greater than FDC : Moreover ECD is greater than A CD , therefore ECD is much greater than F DC . But it is alfo faid , that B D is equal to BC , and fo the Angle ECD under the Bafe of the Ifoceles Triangle is equal to * 5 of this . FDC ...
... greater than FDC : Moreover ECD is greater than A CD , therefore ECD is much greater than F DC . But it is alfo faid , that B D is equal to BC , and fo the Angle ECD under the Bafe of the Ifoceles Triangle is equal to * 5 of this . FDC ...
Σελίδα 17
... greater than the Angle ECF ; there- fore the Angle ACD is greater than the Angle B A E. After the fame manner , if the Right Line BC be bisected , we demonftrate that the Angle BCG , and confequently its equal , the Angle ACD * , is greater ...
... greater than the Angle ECF ; there- fore the Angle ACD is greater than the Angle B A E. After the fame manner , if the Right Line BC be bisected , we demonftrate that the Angle BCG , and confequently its equal , the Angle ACD * , is greater ...
Σελίδα 18
... greater Side of every Triangle fubtends the greater Angle . LE ET ABC be a Triangle , having the Side A C greater than the Side A B. I fay the Angle ABC is greater than the Angle B CA. For , because A C is greater than A B , A D may be ...
... greater Side of every Triangle fubtends the greater Angle . LE ET ABC be a Triangle , having the Side A C greater than the Side A B. I fay the Angle ABC is greater than the Angle B CA. For , because A C is greater than A B , A D may be ...
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD adjacent Angles alfo equal alſo Angle ABC Baſe becauſe bifected Centre Circle A B C Circumference Cofine Cone confequently Cylinder defcribed demonftrated Diameter Diſtance drawn equal Angles equiangular Equimultiples faid fame Altitude fame Multiple fame Plane fame Proportion fame Reafon fecond fhall be equal fimilar fince firft folid Parallelopipedon fome fore ftand fubtending given Right Line Gnomon join leffer lefs likewife Logarithm Magnitudes Meaſure Number parallel Parallelogram perpendicular Polygon Prifm Prop PROPOSITION Pyramid Quadrant Ratio Rectangle Rectangle contained remaining Angle Right Angles Right Line A B Right-lined Figure Segment Semicircle ſhall Sides A B Sine Solid Sphere Square Subtangent thefe THEOREM thofe thro tiple Triangle ABC Unity Vertex the Point Wherefore whofe Bafe
Δημοφιλή αποσπάσματα
Σελίδα 193 - 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.
Σελίδα xxiii - If two triangles have two sides of the one equal to two sides of the other, each to each ; and have likewise the angles contained by those sides equal to each other; they shall likewise have their bases, or third sides, equal; and the two triangles shall be equal; and their other angles shall be equal, each to each, viz. those to which the equal sides are opposite.
Σελίδα 236 - 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.
Σελίδα 11 - ... sides equal to them of the other. Let ABC, DEF be two triangles which have the two sides AB, AC equal to the two sides DE, DF, each to each, viz. AB equal to DE, and AC to DF ; but...
Σελίδα 85 - EA : and because AD is equal to DC, and DE common to the triangles ADE, CDE, the two sides AD, DE are equal to the two CD, DE, each to each ; and the angle ADE is equal to the angle CDE, for each of them is a right angle ; therefore the base AE is equal (4.
Σελίδα 147 - 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.
Σελίδα 50 - CB, and to twice the rectangle AC, CB: but HF, CK, AG, GE make up the whole figure ADEB, which is the square of AB ; therefore the square of AB is equal to the squares of AC, CB, and twice the rectangle AC, CB. Wherefore, if a straight line be divided, &c.
Σελίδα xxv - EF (Hyp.), the two sides GB, BC are equal to the two sides DE, EF, each to each. And the angle GBC is equal to the angle DEF (Hyp.); Therefore the base GC is equal to the base DF (I.
Σελίδα xxxiv - ... therefore their other sides are equal, each to each, and the third angle of the one to the third angle of the other (26.
Σελίδα 194 - ABC, and they are both in the same plane, which is impossible ; therefore the straight line BC is not above the plane in which are BD and BE: wherefore, the three straight lines BC, BD, BE are in one and the same plane. Therefore, if three straight lines, &c.