The straight line joining the middle points of two sides of a triangle is parallel to the third side and equal to half of it 46 INTERCEPTS BY PARALLEL LINES. Solid Geometry - Page 245by George Albert Wentworth - 1899 - 218 pagesFull view - About this book
| Seth Thayer Stewart - Geometry - 1893 - 262 pages
...xx., Cor. i.) ; .-., e = fand а = dif. of _Ls. 4. The straight line joining the points of bisection of two sides of a triangle is parallel to the third side. Through one point of bisection draw a line | to the third side ; it will pass through the other point... | |
| George Albert Wentworth, George Anthony Hill - Geometry - 1894 - 150 pages
...the shortest line which can be drawn from a point to a straight line. 2. 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. 3. Two parallel tangents intercept equal arcs on the circumference of a circle.... | |
| Webster Wells - Geometry - 1894 - 400 pages
...bisects AC. A line drawn from D to the middle _ point of AC will be parallel to BC. [The line joining the middle points of two sides of a triangle is parallel to the third side.] (§ 130.) Then this line will coincide with DE. [But one straight line can be drawn through a given... | |
| Nathan Fellowes Dupuis - Geometry - 1894 - 313 pages
...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... | |
| Wooster Woodruff Beman, David Eugene Smith - Geometry - 1895 - 344 pages
...through the vertex, th. 27 or cor. 1 proves it. Draw the figure. 3. The line joining the mid-points of two sides of a triangle is parallel to the third side. For if not, suppose through the mid-point of one of those sides a line is drawn parallel to the base... | |
| Wooster Woodruff Beman, David Eugene Smith - Geometry - 1895 - 346 pages
...through the vertex, th. 27 or cor. 1 proves it. Draw the figure. 3. The line joining the mid-points of two sides of a triangle is parallel to the third side. For if not, suppose through the mid-point of one of those sides a line is drawn parallel to the base... | |
| George Albert Wentworth - Mathematics - 1896 - 68 pages
...parallel to the base of a triangle, and bisecting one side, bisects the other side also. 189. Cor. 2. The line which joins the middle points of two sides...third side, and is equal to half the third side. 190. Cor. 3. The line which is parallel to the bases of a trapezoid and bisects one leg of the trapezoid... | |
| University of the South - 1896 - 148 pages
...whose sides are perpendicular, each to each, are either equal or supplementary. (2) The line joining the middle points of two sides of a triangle is parallel to the third side, and equal to one-half of it. (3) The angle between a tangent and a chord is measured by one-half its intercepted... | |
| George D. Pettee - Geometry, Modern - 1896 - 272 pages
...polygon is equal to four right angles. 44 PLANE GEOMETRY PROPOSITION XXXI 113. Theorem. The line joining the middle points of two sides of a triangle is parallel to the third side and equal to one-half of it. Appl. Cons. Dem. I = 1 II = II Prove DE II AC and = Draw CFIIAB, meeting DE... | |
| Andrew Wheeler Phillips, Irving Fisher - Geometry, Modern - 1896 - 276 pages
...bisecting one side bisects the other also. Hint.— Apply § 127. 130. Exercise — A straight line joining the middle points of two sides of a triangle is parallel to the third side. Hint. — Show that this line coincides with a line drawn as in § 129. 131. Exercise. — A straight... | |
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