Elements of Geometry and Plane Trigonometry: With an Appendix, and Copious Notes and IllustrationsA. Constable & Company, 1817 - 432 σελίδες |
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Αποτελέσματα 1 - 5 από τα 40.
Σελίδα 14
... angle contained by these in the one be respective- ly equal to two sides and the contained angle in the other . Let ... BAC , BCA opposite to BC and BA are equal respectively to EDF and EFD , which the corre- sponding sides EF and ...
... angle contained by these in the one be respective- ly equal to two sides and the contained angle in the other . Let ... BAC , BCA opposite to BC and BA are equal respectively to EDF and EFD , which the corre- sponding sides EF and ...
Σελίδα 15
... angle . At the point Din the given straight line DE , to form an angle equal to the given angle BAC . In the sides AB and AC of the given angle , assume the points G and H , join GH , from DE cut off DI equal to AG , and on DI consti ...
... angle . At the point Din the given straight line DE , to form an angle equal to the given angle BAC . In the sides AB and AC of the given angle , assume the points G and H , join GH , from DE cut off DI equal to AG , and on DI consti ...
Σελίδα 19
... angle BDA equal to CDE ; these triangles are , therefore , equal ( I. 3. ) , and the angle DCE is equal to DBA . But ... BAC and BCA of the triangle ABC are together less than two right angles . B For produce the common side AC ...
... angle BDA equal to CDE ; these triangles are , therefore , equal ( I. 3. ) , and the angle DCE is equal to DBA . But ... BAC and BCA of the triangle ABC are together less than two right angles . B For produce the common side AC ...
Σελίδα 20
... angles at the base of an isosceles triangle are equal . The angles BAC and BCA at the base of the isosceles triangle ABC are equal . For draw ( I. 5. ) BD bisecting the vertical angle ABC . Because , by hypothesis , AB is equal to BC ...
... angles at the base of an isosceles triangle are equal . The angles BAC and BCA at the base of the isosceles triangle ABC are equal . For draw ( I. 5. ) BD bisecting the vertical angle ABC . Because , by hypothesis , AB is equal to BC ...
Σελίδα 21
... angle is the greater which lies opposite to a greater side . If a side BC of the triangle ABC be greater than BA ; the opposite angle BAC is greater than BCA . For make BD equal to BA , and join AD . The angle CAB is evidently greater ...
... angle is the greater which lies opposite to a greater side . If a side BC of the triangle ABC be greater than BA ; the opposite angle BAC is greater than BCA . For make BD equal to BA , and join AD . The angle CAB is evidently greater ...
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Άλλες εκδόσεις - Προβολή όλων
Elements of Geometry, and Plane Trigonometry: With an Appendix, and Very ... University Professor Emeritus John Leslie, Sir Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD adjacent angle altitude angle ABC angle ADB angle BAC angle BCD base AC bisect centre chord circle circumference consequently construction contained angle cosine decagon denote describe diameter difference distance diverging lines divided draw equal to BC equilateral triangle equivalent to twice evidently exterior angle Geometry greater half Hence hypotenuse inscribed intercepted isosceles triangle join let fall likewise measure parallel perpendicular point G polygon PROB PROP Proposition quadrilateral figure quantities radius ratio rectangle rectangle contained rectilineal figure rhomboid right angles right-angled triangle Scholium segments semicircle semiperimeter side AC sides AB sinAC sinB sine square of AB square of AC tangent THEOR tion triangle ABC twice the rectangle twice the square vertex vertical angle whence Wherefore
Δημοφιλή αποσπάσματα
Σελίδα 30 - ... if a straight line, &c. QED PROPOSITION 29. — Theorem. If a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another ; and the exterior angle equal to the interior and opposite upon the same side ; and likewise the two interior angles upon the same side together equal to two right angles.
Σελίδα 333 - The first of four magnitudes is said to have the same ratio to the second which the third has to the fourth, when any...
Σελίδα 294 - 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...
Σελίδα 10 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Σελίδα 137 - Componendo, by composition ; when there are four proportionals, and it is inferred that the first together with the second, is to the second, as the third together with the fourth, is to the fourth.
Σελίδα 84 - The angle at the centre of a circle is double of the angle at the circumference upon the same base, that is, upon the same part of the circumference.
Σελίδα 292 - Thus, for" example, he to whom the geometrical proposition, that the angles of a triangle are together equal to two right angles...
Σελίδα 93 - UPON a given straight line to describe a segment of a circle containing an angle equal to a given rectilineal angle.
Σελίδα 38 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Σελίδα 58 - The rectangle contained by the sum and difference of two straight lines is equivalent to the difference of the squares of these lines.