 | Education - 1921 - 970 pages
...translates into English: (1) The bisector of the vertex angle of an isosceles triangle bisects the base. (2) The ' bisector of the vertex angle of an isosceles triangle is perpendicular to the base. (3) The base angles of an isosceles triangle are equal. Here all the discoveries are worth remembering... | |
 | Walter Nelson Bush, John Bernard Clarke - Geometry - 1905 - 378 pages
...Definitions and Axioms, therefore, must be carefully studied and thoroughly understood. For example, to prove that the Bisector of the Vertex Angle of an Isosceles Triangle is identical with the Altitude (Group IV, 1 6), we must know the definitions of the following words :... | |
 | Ernst Rudolph Breslich - Mathematics - 1909 - 402 pages
...with the corresponding point of the other. 2. Draw the axis of symmetry of an isosceles triangle. 3. Show that the bisector of the vertex angle of an isosceles triangle is the axis of symmetry. Show how some of the properties of an isosceles triangle stated in § 293 follow... | |
 | Arthur Schultze, Frank Louis Sevenoak - Geometry, Plane - 1913 - 328 pages
...a right angle we usually demonstrate that it is equal to its supplementary adjacent angle. Ex. 169. The bisector of the vertex angle of an isosceles triangle is perpendicular to the base. Ex. 170. The median to the base of an isosceles triangle is perpendicular to the base. Ex. 171. If... | |
 | Arthur Schultze, Frank Louis Sevenoak - Geometry - 1913 - 490 pages
...a right angle we usually demonstrate that it is equal to its supplementary adjacent angle. Ex. 169. The bisector of the vertex angle of an isosceles triangle is perpendicular to the base. Ex. 170. The median to the base of an isosceles triangle is perpendicular to the base. Ex. 171. If... | |
 | Arthur Schultze, Frank Louis Sevenoak - Geometry - 1918 - 486 pages
...a right angle we usually demonstrate that it is equal to its supplementary adjacent angle. Ex. 169. The bisector of the vertex angle of an isosceles triangle is perpendicular to the base. Ex. 170. The median to the base of an isosceles triangle is perpendicular to the base. Ex. 171. If... | |
 | Clarence Addison Willis - Geometry, Modern - 1922 - 320 pages
...Postulate 16; and therefore two homologous sides of these triangles are equal. 123. Theorem VI. — The bisector of the vertex angle of an isosceles triangle is perpendicular to the base (104). Helps. — Use the method of 121 and 122. Certain angles of the two triangles are therefore... | |
 | Clarence Addison Willis - Geometry, Modern - 1922 - 318 pages
...Postulate 16; and therefore two homologous sides of these triangles are equal. 123. Theorem VI.—The bisector of the vertex angle of an isosceles triangle is perpendicular to the base (104). Helps.—Use the method of 121 and 122. Certain angles of the two triangles are therefore equal.... | |
 | Arthur Schultze, Frank Louis Sevenoak - Geometry - 1913 - 484 pages
...a right angle we usually demonstrate that it is equal to its supplementary adjacent angle. Ex. 169. The bisector of the vertex angle of an isosceles triangle is perpendicular to the base. Ex. 170. The median to the base of an isosceles triangle is perpendicular to the base. Ex. 171. If... | |
 | Julius J. H. Hayn - Geometry, Plane - 1925 - 328 pages
..."construction" of lines not given. On this account, we shall meet the isosceles triangle again. 21. The bisector of the vertex angle of an isosceles triangle is perpendicular to the base, and bisects the base. 22. A straight line, perpendicular to a radius at its outer extremity, is tangent... | |
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The bisector of the vertex angle of an isosceles triangle is perpendicular to the base. 
