| 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.... | |
| 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... | |
| 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... | |
| 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... | |
| 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 BDħAC. Ex. 172. In the diagram opposite,... | |
| 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 BDħAC. Ex. 172. In the diagram opposite,... | |
| 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.... | |
| 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 BDħAC. Ex. 172. In the diagram opposite,... | |
| 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... | |
| 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 BDħAC. C Ex. 172. In the diagram opposite,... | |
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