Elements of plane geometry, book i, containing nearly the same propositions as the first book of Euclid's Elements1865 |
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Side 46
... exterior angle is greater than either of the interior opposite angles . Let ABC be a triangle , and let its side BC be produced to D , the exterior angle ACD is greater than either of the interior opposite angles CBA or BAC . A E F G ...
... exterior angle is greater than either of the interior opposite angles . Let ABC be a triangle , and let its side BC be produced to D , the exterior angle ACD is greater than either of the interior opposite angles CBA or BAC . A E F G ...
Side 47
Euclides. the angles ABC , ACB , are together less than two right angles . In like ... angle opposite to it . Let ABC be a triangle , of which the side AC is ... exterior angle of the triangle BDC , it is greater ( 16 ) than the interior ...
Euclides. the angles ABC , ACB , are together less than two right angles . In like ... angle opposite to it . Let ABC be a triangle , of which the side AC is ... exterior angle of the triangle BDC , it is greater ( 16 ) than the interior ...
Side 49
... exterior angle of a triangle is ( 16 ) greater than the interior opposite angle , the exterior angle BDC of the triangle CDE is greater than CED ; for the same reason , the exterior angle CEB of the triangle ABE is greater than BAC ...
... exterior angle of a triangle is ( 16 ) greater than the interior opposite angle , the exterior angle BDC of the triangle CDE is greater than CED ; for the same reason , the exterior angle CEB of the triangle ABE is greater than BAC ...
Side 51
... angle . PROPOSITION XXV . THEOR . Of all the straight lines that can be drawn from the same point to a straight line ... exterior angle of the triangle CED , is greater than the interior opposite angle CDE ; therefore the angle CEF is ...
... angle . PROPOSITION XXV . THEOR . Of all the straight lines that can be drawn from the same point to a straight line ... exterior angle of the triangle CED , is greater than the interior opposite angle CDE ; therefore the angle CEF is ...
Side 56
... exterior angle is equal to the two interior opposite angles . Let BC , one of the sides of the triangle ABC , be produced to D , the exterior angle ACD is equal to the interior opposite angles ABC and BAC . For the three interior angles ...
... exterior angle is equal to the two interior opposite angles . Let BC , one of the sides of the triangle ABC , be produced to D , the exterior angle ACD is equal to the interior opposite angles ABC and BAC . For the three interior angles ...
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Elements of Plane Geometry, Book: Containing Nearly the Same Propositions As ... Euclid Ingen forhåndsvisning tilgjengelig - 2008 |
Vanlige uttrykk og setninger
AB is equal ABC and DEF ABC is equal acute adjacent angles ancient geometers angle ACD angle AGH angle BAC angles ABC angles equal angular magnitude base BC bisect centre circumference coincide diagonal drawn EBCF equal alternate angles equal Def equal to BC Euclid EUCLID'S ELEMENTS exterior angle figure has sides four right angles geometers given point given straight line greater than AC included angle interior opposite angle intersect isosceles triangle join less Let ABC Let the straight method method of exhaustions parallel lines parallel to CD parallelogram ABCD perpendicular PLANE GEOMETRY point F PROB proof properties of parallel PROPOSITION Pythagoras radius rectangle rectilineal figure reductio ad absurdum Scholium side AB side AC straight line BC THEOR theorem three angles three sides triangle ABC triangle DEF triangles are equal truths unequal vertex vertical angle wherefore
Populære avsnitt
Side 43 - If two triangles have two sides and the included angle of the one, equal to two sides and the included angle of the other, each to each, the two triangles will be equal.
Side 46 - Any two angles of a triangle are together less than two right angles.
Side 37 - The angles which one straight line makes with another upon one tide of it, are either two right angles, or are together equal to two right angles. Let the straight line AB make with CD, upon one side of it the angles CBA, ABD ; these are either two right angles, or are together equal to two right angles. For, if the angle CBA be equal to ABD, each of them is a right angle (Def.
Side 57 - Through a given point to draw a straight line parallel to a given straight line, Let A be the given point, and BC the given straight line : it is required to draw through the point A a straight line parallel to BC.
Side 38 - ... in one and the same straight line. At the point B in the straight line AB, let the two straight lines BC, BD upon the opposite sides of AB, make the adjacent angles ABC, ABD, equal together to two right angles. BD is in the same straight line with CB.
Side 68 - 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.
Side 34 - LET it be granted that a straight line may be drawn from any one point to any other point.
Side 64 - Parallelograms upon the same base, and between the same parallels, are equal to one another.
Side 46 - If one side of a triangle be produced, the exterior angle is greater than either of the interior, and opposite angles.
Side 34 - Things which are equal to the same thing are also equal to one another. 2. If equals be added to equals, the wholes are equal. 3. If equals be subtracted from equals, the remainders are equal.