Books Books The median to the base of an isosceles triangle is perpendicular to the base. Plane Geometry - Page 88
by Fletcher Durell - 1904 - 372 pages ## Plane and Solid Geometry

Fletcher Durell - Geometry - 1911 - 553 pages
...of the angle. BOOK I. PLANE GEOMETRY Ex. 4- If equal segments from the base be laid off on (lie logs of an isosceles triangle, the lines drawn from the...are complements (or supplements) of equal angles; or Inj the use of the properties of parallel lines; or that their sides are parallel, or perpendicular.... ## Plane and Solid Geometry

George Albert Wentworth - Geometry - 1904 - 496 pages
...OC, and BO = OE, § 128 (being homologous sides of equal &). QED Ex. 13. The median from the vertex to the base of an isosceles triangle is perpendicular to the base, and bisects the vertical angle. Ex. 14. If two straight lines are cut by a transversal so that the... ## A Scrap-book of Elementary Mathematics: Notes, Recreations, Essays

William Frank White - Mathematical recreations - 1908 - 274 pages
...crosses the mark, Fig. 17. the bar at the base is horizontal, being perpendicular to the plumb line. The median to the base of an isosceles triangle is perpendicular to the base. From the lengths of the sides of the triangle it may be computed—or it may be found by trial—how... ## The Teaching of Geometry

David Eugene Smith - Geometry - 1911 - 358 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, draw the figure and think that there is given AC=BC, AD = JW, and that there is to be proved that Z.CDA... ## Schultze and Sevenoak's Plane Geometry

Arthur Schultze, Frank Louis Sevenoak - Geometry, Plane - 1913 - 328 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. Ex. 172. In the diagram opposite,... ## Schultze and Sevenoak's Plane and Solid Geometry

Arthur Schultze, Frank Louis Sevenoak - Geometry - 1913 - 488 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. Ex. 172. In the diagram opposite,... ## Plane Geometry

Jacob William Albert Young, Lambert Lincoln Jackson - Geometry, Plane - 1916 - 328 pages
...triangle. 2. Prove that in a rectangle not a square the bisectors of the angles inclose a square. 3. The median to the base of an isosceles triangle is perpendicular to the base. 4. The perpendicular bisector of the base of an isosceles triangle passes through the opposite vertex.... ## Schultze and Sevenoak's Plane and Solid Geometry

Arthur Schultze, Frank Louis Sevenoak - Geometry - 1918 - 486 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. Ex. 172. In the diagram opposite,... ## Drill Book in Plane Geometry

Robert Remington Goff - 1922 - 136 pages
...EXERCISES /. The bisector of the vertical angle of an isosceles triangle is perpendicular to the base. 2. The median to the base of an isosceles triangle is perpendicular to the base. 3. The bisectors of two supplementary adjacent angles are perpendicular to each other. 5. If a parallelogram... 