The Elements of Plane GeometryS. Sonnenschein & Company, 1903 |
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Side 17
... ABC , ABD be together equal to two right angles . Because the sum of the adjacent angles ABC , ABD is the angle contained by BC , BD , Del . S. B and this angle is a straight angle , since CBD ANGLES AT A POINT 17.
... ABC , ABD be together equal to two right angles . Because the sum of the adjacent angles ABC , ABD is the angle contained by BC , BD , Del . S. B and this angle is a straight angle , since CBD ANGLES AT A POINT 17.
Side 18
Association for the Improvement of Geometrical Teaching. and this angle is a straight angle , since CBD is a straight line , Def . 7 . therefore the angles ABC , ABD are together equal to a straight angle , that is , to two right angles ...
Association for the Improvement of Geometrical Teaching. and this angle is a straight angle , since CBD is a straight line , Def . 7 . therefore the angles ABC , ABD are together equal to a straight angle , that is , to two right angles ...
Side 19
Association for the Improvement of Geometrical Teaching. Because the sum of the adjacent angles ABC , ABD is the angle contained by BC , BD , and the sum of the angles ABC , ABD is two right angles , Def . 8 . Hyp . therefore the angle ...
Association for the Improvement of Geometrical Teaching. Because the sum of the adjacent angles ABC , ABD is the angle contained by BC , BD , and the sum of the angles ABC , ABD is two right angles , Def . 8 . Hyp . therefore the angle ...
Side 22
... angle contained by those sides is called the vertical angle , the third side the base . THEOR . 5. If two triangles ... ABC , DEF be two triangles having the side AB equal to the side DE , the side AC to the side DF , and the angle BAC ...
... angle contained by those sides is called the vertical angle , the third side the base . THEOR . 5. If two triangles ... ABC , DEF be two triangles having the side AB equal to the side DE , the side AC to the side DF , and the angle BAC ...
Side 23
... triangle DEF , and is therefore identically equal to it , the side BC equal to the side EF , the angle ACB to the angle DFE , and the angle ABC to the angle DEF . Ax . 1 . Q.E.D. Ex . 4. The straight line which bisects the vertical angle ...
... triangle DEF , and is therefore identically equal to it , the side BC equal to the side EF , the angle ACB to the angle DFE , and the angle ABC to the angle DEF . Ax . 1 . Q.E.D. Ex . 4. The straight line which bisects the vertical angle ...
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The Elements of Plane Geometry ... Association for the improvement of geometrical teaching Uten tilgangsbegrensning - 1884 |
Vanlige uttrykk og setninger
ABCD AC is equal adjacent angles altitude angle ABC angle ACB angle BAC angle DAE angle DEF angle equal angle HBK base bisectors chord HK circle ABC circle whose centre circles DEF circles touch circumscribed circle coincide Constr diagonal diameter distance equal circles equal to AC equiangular exterior angle externally given angle given circle given point given ratio given straight line greater Hence hypotenuse identically equal inscribed circle isosceles triangle less Let ABC line joining magnitudes meet the circumference middle point minor arc multiple nine-points circle opposite angle opposite sides orthocentre parallelogram perpendicular point of contact polygon Prob produced proportional Prove Q.E.D. THEOR quadrilateral radii radius ratio compounded rectangle AC rectangle contained rectilineal figure rhombus right angles Shew side BC squares on BD straight line drawn tangent Theorem triangle ABC triangle DEF twice the rectangle vertical angle
Populære avsnitt
Side 41 - 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.
Side 182 - IF from any point without a circle two straight lines be drawn, one of which cuts the circle, and the other touches it ; the rectangle contained by the whole line which cuts the circle, and the part of it without the circle,. shall be equal to the square of the line which touches it.
Side 67 - A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.
Side 167 - 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.
Side 32 - Any two sides of a triangle are together greater than the third side.
Side 34 - Of all the straight lines that can be drawn to a given straight line from a given point outside it, the perpendicular is the shortest.
Side 23 - The lines drawn from the extremities of the base of an isosceles triangle to the middle points of the opposite sides are equal.
Side 63 - If there are three or more parallel straight lines, and the intercepts made by them on any straight line that cuts them are equal, then the corresponding intercepts on any other straight line that cuts them are also equal.
Side 39 - If two triangles have the three sides of the one equal to the three sides of the other, each to each, the triangles are congruent.
Side 106 - Iff a straight line be divided into any two parts, four times the rectangle contained by the whole line, and one of the parts, together with the square of the other part, is equal to the square of the straight line which is made up of the whole and that part.