 | Arthur Schultze, Frank Louis Sevenoak - Geometry - 1913 - 484 pages
...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 in quadrilateral ABCD AB = BC, and CD = DA, then BD±AC. C Ex. 172. In the diagram opposite,... | |
 | Walter Burton Ford, Charles Ammermann - Geometry, Modern - 1923 - 406 pages
...CD. What other lines are parallel ? [HINT. See §§ 3, 45, 54.] 10. Prove that the median (see § 33) to the base of an isosceles triangle is perpendicular to the base. 11. Prove that if a median in any triangle is perpendicular to the base to which it is drawn, the triangle... | |
 | Walter Burton Ford, Charles Ammerman - Geometry, Plane - 1923 - 414 pages
...CD. What other lines are parallel? [HINT. See §§ 3, 45, 54.] 10. Prove that the median (see § 33) to the base of an isosceles triangle is perpendicular to the base. 11. Prove that if a median in any triangle is perpendicular to the base to which it is drawn, the triangle... | |
 | David Eugene Smith, William David Reeve - Mathematics - 1927 - 428 pages
...definition for the name of the thing defined. Thus instead of thinking too long about proving that the median to the base of an isosceles triangle is perpendicular to the base, let him draw the figure and think that there is given c AC = EC, AD = BD, and that there is to be proved... | |
| |
The median to the base of an isosceles triangle is perpendicular to the base. 
