If from any point in the base of an isosceles triangle parallels to the equal sides be drawn, show that a parallelogram is formed whose perimeter is equal to the sum of the equal sides of the triangle. Junior High School Mathematics ... - Page 35by Edson Homer Taylor, Fiske Allen - 1923Full view - About this book
| Miles Bland - Euclid's Elements - 1819 - 444 pages
...equal angles are reciprocally proportional, and .'* (Eucl. vi. 15.) the triangles ADE, FCD are equal. **(11.) . If from any point in the base of an isosceles triangle** perpendiculars be drawn to the sides ; these together shall be equal to a perpendicular drawn from... | |
| Miles Bland - Euclid's Elements - 1819 - 442 pages
...base, and the lines joining the intersections of the sides and the angles opposite, will be equal. **11. If from any point in the base of an isosceles triangle** perpendiculars be drawn to the sides ; these together shall be equal to a perpendicular drawn from... | |
| William Chauvenet - Geometry - 1871 - 380 pages
...perpendicular to AC, the angle DBC is equal to one-half the angle A (I. 73). 12. If from a variable **point in the base of an isosceles triangle parallels to the sides are drawn,** a parallelogram is formed whose perimeter is constant. 13. If from a variable point P in the base of... | |
| William Chauvenet - Geometry - 1872 - 382 pages
...perpendicular to AC, the angle DBC is equal to one-half the angled. (I. 73). 12. If from a variable **point in the base of an isosceles triangle parallels to the sides are drawn,** a parallelogram is formed whose perimeter is constant. 13. If from a variable point P in the base of... | |
| Public schools - 1873
...<"> 9. Show when two (riedral angles are either equal or symmetrical. <*>> 10. If, from a variable **point in the base of an isosceles triangle, parallels to the sides are drawn,** a parallelogram is formed whose perimeter is constant. «'•» 5 jfunier Class. 1. Explain the method... | |
| George Albert Wentworth - Geometry - 1877 - 416 pages
...the middle points of AD and B С respectively ; show that BE and DF will trisect the diagonal A C. **11. If from any point in the base of an isosceles triangle parallels to the** equal sides be drawn, show that a parallelogram Is formed whose perimeter is equal to the sum of the... | |
| George Albert Wentworth - 1879 - 196 pages
...bisects the side CH at K. .'. CK = ^7. .'. ^J7, Z^, and A'C are equal. That is, AC is trisected. Ex. **11. If from any point in the base of an isosceles triangle parallels to the** equal sides be drawn, show that a parallelogram is formed whose perimeter is equal to the sum of the... | |
| George Albert Wentworth - 1881 - 266 pages
...middle points of AD and B С respectively ; show that BE and DF will trisect the diagonal A C. II. **If from any point in the base of an isosceles triangle parallels to the** equal sides be drawn, show that a parallelogram is formed whose perimeter is equal to the sum of the... | |
| George Albert Wentworth - Geometry, Modern - 1879 - 262 pages
...F the middle points of AD and BC respectively ; show that BE and DF will trisect the diagonal A C. **11. If from any point in the base of an isosceles triangle parallels to the** equal sides be drawn, show that a parallelogram is formed whose perimeter is equal to the sum of the... | |
| Franklin Ibach - Geometry - 1882 - 208 pages
...right.angled triangle is double the other, the hypothenuse is double the shortest side. 7. If through **any point in the base of an isosceles triangle parallels to the** equal sides are drawn, a parallelogram is formed whose perimeter equals the sum of the equal sides... | |
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