 A line joining the midpoints of the non.parallel sides of a trapezoid is parallel to the base, and equal to half the sum of the bases.  Plane Geometry - Σελίδα 96των Clara Avis Hart, Daniel D. Feldman - 1911 - 303 σελίδεςΠλήρης προβολή - Σχετικά με αυτό το βιβλίο
 | George Bruce Halsted - 1885 - 389 σελίδες
...equal sects on any transversal, they intercept equal sects on every transversal. 230. COROLLARY I. The line joining the mid-points of the non-parallel sides of a trapezoid is parallel to the parallel sides, for we have just proved it identical with a line drawn parallel to... | |
 | George Bruce Halsted - 1886 - 394 σελίδες
...equal sects on any transversal, they intercept equal sects on every transversal. 230. COROLLARY I. The line joining the mid-points of the non-parallel sides of a trapezoid is parallel to the parallel sides, for we have just proved it identical with a line drawn parallel to... | |
 | Wooster Woodruff Beman, David Eugene Smith - 1895 - 344 σελίδες
...bisected at two different points. (This is the converse of cor. 2. Draw the figure.) EXERCISES. 162. The line joining the mid-points of the non-parallel sides of a trapezoid is parallel to the bases. 163. In a right-angled triangle the mid-point of the hypotenuse is equidistant... | |
 | Wooster Woodruff Beman, David Eugene Smith - 1895 - 346 σελίδες
...bisected at two different points. (This is the converse of cor. 2. Draw the figure.) EXERCISES. 162. The line joining the mid-points of the non-parallel sides of a trapezoid is parallel to the bases. 1(53. In a right-angled triangle the mid-point of the hypotenuse is equidistant... | |
 | Wooster Woodruff Beman, David Eugene Smith - 1899 - 412 σελίδες
...joining the mid-points of two sides of a triangle equals half the third side. (Prove it.) Exercises. 111. The line joining the mid-points of the non'parallel sides of a trapezoid is parallel to the bases. 112. In a right-angled triangle the mid.point of the hypotenuse is / equidistant... | |
 | Wooster Woodruff Beman, David Eugene Smith - 1899 - 272 σελίδες
...joining the mid-points of two sides of a triangle equals half the third side. (Prove it.) Exercises. 111. The line joining the mid-points of the non-parallel sides of a trapezoid is parallel to the bases. 112. In a right-angled triangle the mid-point of the hypotenuse is equidistant... | |
 | Arthur Schultze, Frank Louis Sevenoak - 1902 - 394 σελίδες
...midpoints of the three sides of a triangle are joined, four equal triangles are formed. Ex. 214. A line joining the midpoints of the non-parallel sides of a trapezoid is parallel to the base, and equal to half the sum of the bases. 148. DEF. An equiangular polygon is one... | |
 | Arthur Schultze, Frank Louis Sevenoak - 1901 - 396 σελίδες
...midpoints of the three sides of a triangle are joined, four equal triangles are formed. * Ex. 214. A line joining the midpoints of the non.parallel sides of a trapezoid is parallel to the base, and equal to half the sum of the bases. 148. DEF. An equiangular polygon is one... | |
 | Arthur Schultze - 1901 - 260 σελίδες
...midpoints of the three sides of a triangle are joined, four equal triangles are formed. * Ex. 214. A line joining the midpoints of the non.parallel sides of a trapezoid is parallel to the base, and equal to half the sum of the bases. 148. DBF. An equiangular polygon is one... | |
 | Arthur Schultze, Frank Louis Sevenoak - 1901 - 394 σελίδες
...midpoints of the three sides of a triangle are joined, four equal triangles are formed. Ex. 214. A line joining the midpoints of the non.parallel sides of a trapezoid is parallel to the base, and equal to half the sum of the bases. 148. DEF. An equiangular polygon is one... | |
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