| John Bascombe Lock - 1888 - عدد الصفحات: 278
...one of the sides of another piece of cardboard. Shew that their cGs are superposed. The line joining the middle points of two sides of a triangle is parallel to the third side of the triangle and is bisected by the line joining the middle point of the third side to the opposite... | |
| George Albert Wentworth - 1888 - عدد الصفحات: 272
...they intercept equal parts on the transversal AC ; that is, the line DE bisects AC. 189. COR. 2. The line which joins the middle points of two sides of a triangle is para/lei to the third side, and is equal to half the third side. For, a line drawn through D, the middle... | |
| George Albert Wentworth - 1889 - عدد الصفحات: 276
...every point not in the bisector is unequally distant from the sides. 70. Theorem. The line joining the middle points of two sides of a triangle is parallel to the third side and equal to half of the third side. 71. Theorem. A straight line drawn parallel to the base of a triangle,... | |
| George Albert Wentworth - 1889 - عدد الصفحات: 264
...every point not in the bisector is unequally distant from the sides. 70. Theorem. The line joining the middle points of two sides of a triangle is parallel to the third side and equal to half of the third side. 71. Theorem. A. straight line drawn parallel to the base of a... | |
| Nathan Fellowes Dupuis - 1889 - عدد الصفحات: 370
...one side of a triangle, parallel to a second side, bisects the third side. And, 2, the line through the middle points of two sides of a triangle is parallel to the third side. 85°. Theorem. — The three medians of a triangle pass through a common point. CF and AD are medians... | |
| Edward Albert Bowser - 1890 - عدد الصفحات: 418
...(153). But this latter intercept = 0. .-. BC-DE = DE. .-. DE = £BC. QED 155. COR. 1. The line joining the middle points of two sides of a triangle is parallel to the third side, and equal to half of it. 156. COR. 2. Let ABCD be a trape- D/ - <.C zoid, AG = GD, and Gil || to AB.... | |
| Euclid - 1890 - عدد الصفحات: 442
...parallel is terminated by the sides, or the sides produced. 66 C THEOREM (13)— The join of two mid points of two sides of a triangle is parallel to the third side, and half of it. In A ABC let D be the mid pt. of AB, and E of AC. Join DE ; and produce it to F, so... | |
| Seth Thayer Stewart - 1891 - عدد الصفحات: 428
...general, that : A straight line drawn from the middle point, etc. Corollary L The straight line joining the middle points of two sides of a triangle is parallel to the third side and equal to one-half of it. Corollary II. The sides of a triangle passing through the vertices of... | |
| Rupert Deakin - 1891 - عدد الصفحات: 102
...middle points of the sides of a triangle perpendicular to the sides meet in a point. 2. The straight Hue which joins the middle points of two sides of a triangle is equal to half the third side. 3. Show how to bisect a triangle by a straight line drawn through one... | |
| Seth Thayer Stewart - 1891 - عدد الصفحات: 428
...perpendiculars to it from the other vertices. 4. The straight line joining the points of bisection of two sides of a triangle is parallel to the third side. 5. If a straight line be drawn through any vertex of a parallelogram so as not to intersect the parallelogram,... | |
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