Elements of GeometryGinn and Heath, 1877 - 250 σελίδες |
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Σελίδα 9
... angle , consequently , will not be changed . 24. DEF . Adjacent Angles are angles having a common vertex and a common side between them . Thus the angles CDE and CDF are adjacent angles . E D A C B C F 25. DEF . A Right Angle is an angle ...
... angle , consequently , will not be changed . 24. DEF . Adjacent Angles are angles having a common vertex and a common side between them . Thus the angles CDE and CDF are adjacent angles . E D A C B C F 25. DEF . A Right Angle is an angle ...
Σελίδα 10
... right angles and the given angle . Thus ACD is the supplement of the angle D C B ; also D C B is the supplement of the angle AC D. 32. DEF . Vertical Angles are angles which have the same vertex , and their sides extending in opposite ...
... right angles and the given angle . Thus ACD is the supplement of the angle D C B ; also D C B is the supplement of the angle AC D. 32. DEF . Vertical Angles are angles which have the same vertex , and their sides extending in opposite ...
Σελίδα 11
... right angles ; and the sum of all the angles about a point on one side of a straight line drawn through that point , as BOC + COD , etc. , Fig . 2 , is equal to two right AOB angles . Hence two adjacent angles , O CA and OCB , formed by ...
... right angles ; and the sum of all the angles about a point on one side of a straight line drawn through that point , as BOC + COD , etc. , Fig . 2 , is equal to two right AOB angles . Hence two adjacent angles , O CA and OCB , formed by ...
Σελίδα 14
... angles . A triangle . A triangles . parallel . parallelograin S parallelograms . perpendicular . perpendiculars . rt . right angle . rt . right angles . > is ( or are ) greater than . < is ( or are ) less than . rt . A right triangle ...
... angles . A triangle . A triangles . parallel . parallelograin S parallelograms . perpendicular . perpendiculars . rt . right angle . rt . right angles . > is ( or are ) greater than . < is ( or are ) less than . rt . A right triangle ...
Σελίδα 15
... angles are equal . B A Let line 0 P cross A B at C. We are to prove LOCB = LACP . ZOCA + Z OCB 2 rt . 4 , $ 34 ... right angles . PROPOSITION II . THEOREM . 51. When the sum of PERPENDICULAR AND OBLIQUE LINES . 15.
... angles are equal . B A Let line 0 P cross A B at C. We are to prove LOCB = LACP . ZOCA + Z OCB 2 rt . 4 , $ 34 ... right angles . PROPOSITION II . THEOREM . 51. When the sum of PERPENDICULAR AND OBLIQUE LINES . 15.
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A B C AABC AACB ABCD adjacent angles alt.-int altitude apothem arc A B bisect centre circumference circumscribed coincide COROLLARY describe an arc diagonals diameter divided Draw equal arcs equal distances equal respectively equiangular polygon equilateral equilateral polygon exterior angles figure given line given point given polygon given straight line greater homologous sides hypotenuse isosceles triangle Let A B Let ABC limit line A B measured by arc middle point number of sides parallelogram perimeter perpendicular plane PROBLEM prove Q. E. D. PROPOSITION quadrilateral radii radius equal ratio rect rectangles regular inscribed regular polygon required to construct rhombus right angles right triangle SCHOLIUM segment sides of equal sides of similar similar polygons subtend tangent THEOREM third side triangle ABC variable vertex vertices