 | Richard Wormell - 1876 - 268 sider
...through the middle point of a side of a triangle parallel to the base it will bisect the other side. 43. The line joining the middle points of two sides of a triangle is equal to half the third side and is parallel to it. 44. If from points in the base of an isosceles... | |
 | Elias Loomis - 1877 - 458 sider
...the angles of the square. PROPOSITION III. 5. The straight line which joins the middle points of any two sides of a triangle is parallel to the third side, and is equal to one half of that side. In the triangle ABC, let D be the middle point of AB, and E the middle point of AC ;... | |
 | James McDowell - 1878 - 310 sider
...find them 2 3. To divide a given straight line into any number of equal parts. CoB 2 4. 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 2 5. The straight lines drawn from the vertices of a triangle to bisect the opposite... | |
 | James Maurice Wilson - 1878 - 450 sider
...triangle parallel to the base passes through the middle point of the other side. COR. 2. The straight line joining the middle points of two sides of a triangle is parallel to the base. EXERCISES FOR SOLUTION. i. If ABC is an isosceles triangle and A is double of either B or C,... | |
 | William Henry Harrison Phillips - 1878 - 236 sider
...sides of a triangle is parallel to the third D/. side. COR. 2, Since DE = BF = FC, DE = ^ that is, the line joining the middle, points of two sides of a triangle is equal to one-half the third side. COR. 3. If, in the trapezoid ABCD, E and F are the middle points... | |
 | Charles Mansford - 1879 - 112 sider
...[Bisect BC in O. Join PO and draw AQ parallel to it. Then PQ shall bisect the triangle.] 53. 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. 54. The straight lines joining the middle points of the four sides of any quadrilateral... | |
 | Euclides - 1879 - 146 sider
...are equal. Show that two sides of the quadrilateral are parallel. 2. The straight line which joins the middle points of two sides of a triangle is parallel to the base. 3. The straight line which joins the middle points of two sides of a triangle is equal to half... | |
 | Charles Scott Venable - 1881 - 380 sider
...the corresponding side of the given triangle. 25. (Corollary of 24. ) The straight line which joins the middle points of two sides of a triangle is parallel to the third side and equal to the half of it. And, conversely, if, through the middle point, D, of the side, AB, of a triangle,... | |
 | 1882 - 486 sider
...equal to AN. That is, AC is bisected in N. NOTE. — MN is equal to half of AB. Hence the straight line joining the middle points of two sides of a triangle is parallel to the third side, and equal to its half, Draw MP,LR, parallel to AF, and join ML, PR. Then from the property of the triangle... | |
 | Mathematical association - 1883 - 86 sider
...triangle parallel to the base passes through the middle point of the other side. COR. 3. The straight line joining the middle points of two sides of a triangle is parallel to the base. [Cor. 2. and Rule of Identity.] SECTION 4. PROBLEMS. PROB. 1. To bisect a given angle. PROB.... | |
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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. 
