The Elements of Plane GeometryS. Sonnenschein & Company, 1903 |
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Seite 16
... angle . DEF . 13. An obtuse angle is that which is greater than one right angle , but less than two right angles ... BAC . Def . 7 . For a like reason DE , DF are in the same straight line EDF . Then the straight line BAC can be made to ...
... angle . DEF . 13. An obtuse angle is that which is greater than one right angle , but less than two right angles ... BAC . Def . 7 . For a like reason DE , DF are in the same straight line EDF . Then the straight line BAC can be made to ...
Seite 22
... angle contained by those sides is called the vertical angle , the third side the base . THEOR . 5. If two triangles have two sides of the one equal to two sides of the other , each to each ... angle BAC 22 THE ELEMENTS OF PLANE GEOMETRY.
... angle contained by those sides is called the vertical angle , the third side the base . THEOR . 5. If two triangles have two sides of the one equal to two sides of the other , each to each ... angle BAC 22 THE ELEMENTS OF PLANE GEOMETRY.
Seite 23
... angle BAC is equal to the angle EDF , Hyp . and , AC falling along DF , C will fall on F , since AC is equal to DF . Hyp . Hence , B falling on E , and C on F , BC will coincide with Ax . 2 . EF , and the triangle ABC will coincide with ...
... angle BAC is equal to the angle EDF , Hyp . and , AC falling along DF , C will fall on F , since AC is equal to DF . Hyp . Hence , B falling on E , and C on F , BC will coincide with Ax . 2 . EF , and the triangle ABC will coincide with ...
Seite 24
... angles . Let ABC , DEF be two triangles having the angle ABC equal to the angle DEF , the angle ACB to the angle DFE , and the side BC to the side EF : B then shall the triangles be identically equal , having the angle BAC equal to the ...
... angles . Let ABC , DEF be two triangles having the angle ABC equal to the angle DEF , the angle ACB to the angle DFE , and the side BC to the side EF : B then shall the triangles be identically equal , having the angle BAC equal to the ...
Seite 25
... angle BAC equal to the angle EDF , the side AC to the side DF , and the side AB to the side DE . Q.E.D. Ex . 10. If the bisector of an angle of a triangle is also perpendi- cular to the opposite side , the triangle is isosceles . THEOR ...
... angle BAC equal to the angle EDF , the side AC to the side DF , and the side AB to the side DE . Q.E.D. Ex . 10. If the bisector of an angle of a triangle is also perpendi- cular to the opposite side , the triangle is isosceles . THEOR ...
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Häufige Begriffe und Wortgruppen
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
Beliebte Passagen
Seite 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.
Seite 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.
Seite 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.
Seite 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.
Seite 32 - Any two sides of a triangle are together greater than the third side.
Seite 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.
Seite 23 - The lines drawn from the extremities of the base of an isosceles triangle to the middle points of the opposite sides are equal.
Seite 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.
Seite 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.
Seite 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.