 | Daniel Cresswell - 1819 - عدد الصفحات: 446
...(constr.) the figure DCFE is aa ; .•. (E. S4. 1.) EF=DC; and (constr.) DC=B; .-. PROP. LIII. 70. THEOREM. If, from the summit of the right angle of a scalene...shall contain an angle equal to the difference of the ftro acute angles of the triangle. Let the LA, of the A BAC be a right L ; let A / BEDC AE be drawn... | |
 | Daniel Cresswell - 1819 - عدد الصفحات: 486
...figure DCFE is aa ; .-. (E. 34. 1.) EF=DC; and (owwfr.) DC=B; .-. EF=B. ' PROP. LIII. A SUPPLEMENT TO THE hypotenuse, and the other bisecting it, they...difference of the two acute angles of the triangle. Let the LA, of the A BAC be a right L ; let A B ED C AE be drawn to the bisection E, of the hypotenuse... | |
 | Daniel Cresswell - 1825 - عدد الصفحات: 616
...given finite straight line, not less than the perpendicular distance of the two parallels. LIII. TH. If, from the summit of the right angle of a scalene...difference of the two acute angles of the triangle. LIV. PR. To bisect a parallelogram by a straight line drawn through a given point in one of its sides.... | |
 | Euclides - 1845 - عدد الصفحات: 546
...triangle two straight lines be drawn, one perpendicular to the base, and the other bisecting it, they will contain an angle equal to the difference of the two acute angles of the triangle. 10. If one angle at the base of a triangle be double of 'the other, the less side is equal to the sum... | |
 | Euclides - 1846 - عدد الصفحات: 292
...of a triangle two lines be drawn, one bisecting the base and the other perpendicular to it, they wUl contain an angle equal to the difference of the two acute angles of the triangle. 70. Find the point in the base of a triangle, from which lines drawn parallel to the sides to meet... | |
 | London univ - 1852 - عدد الصفحات: 358
...triangle two straight lines be drawn, one perpendicular to the base, and the other bisecting it, they will contain an angle equal to the difference of the two acute angles of the triangle. lineal angle ; and thence prove that the perimeter of an isosceles triangle is greater than that of... | |
 | Robert Potts - 1860 - عدد الصفحات: 380
...triangle, two straight lines be drawn, one perpendicular to the base, and the other bisecting it, they will contain an angle equal to the difference of the two acute angles of the triangle. 34. If the vertical angle CAB of a triangle ABC be bisected by AD, to which the perpendiculars CIS,... | |
 | Euclides - 1864 - عدد الصفحات: 448
...triangle, two straight lines be drawn, one perpendicular to the base, and the other bisecting it, they will contain an angle equal to the difference of the two acute angles of the triangle. 34. If the vertical angle CAB of a triangle ABC be bisected by AD, to which the perpendiculars CE,... | |
 | Euclides - 1864 - عدد الصفحات: 262
...triangle, two straight lines be drawn, one perpendicular to the base, and the other bisecting it, they will contain an angle equal to the difference of the two acute angles of the triangle. 34. If the vertical angle CAB of a triangle ABC be bisected by AD, to which the perpendiculars CE,... | |
 | Eli Todd Tappan - 1864 - عدد الصفحات: 288
...and if D be the middle of EC, then DE is equal to DF. dicular to it, the angle of these two lines is equal to the difference of the two acute angles of the triangle. 9. In the base of a triangle, find the point from which lines extending to the sides, and parallel... | |
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If from the right angle of a right-angled triangle, two straight lines be drawn, one perpendicular to the base, and the other bisecting it, they will contain an angle equal to the difference of the two acute angles of the triangle. 
