 | George Clinton Shutts - 1894 - 412 σελίδες
...point of the base is perpendicular to the base, the triangle is isosceles. Ex. 29. Prove that a Une drawn from the vertex of an isosceles triangle to the middle of the base, (/) bisects the triangle, (2) bisects the vertical angle, (j) is perpendicular to the base. PROPOSITION... | |
 | John Henry Walsh - 1895 - 402 σελίδες
...necessary to draw the chord. Permit them to do so at first. 15. The pupils have already learned that a line drawn from the vertex of an isosceles triangle to the center of the base, is perpendicular to the base. The method employed in bisecting a line is practically... | |
 | John Henry Walsh - 1896 - 282 σελίδες
...necessary to draw the chord. Permit them to do so at first. 16. The pupils have already learned that a line drawn from the vertex of an isosceles triangle to the center of the base, is perpendicular to the base. The method employed in bisecting a line is practically... | |
 | George Washington Hull - 1897 - 408 σελίδες
...they are mutually equiangular. § 603 Therefore Z A = /. B. QED 608. COR.—The arc of a great circle drawn from the vertex of an isosceles triangle to the middle of the base bisects the vertical angle and is perpendicular to the base. EXERCISES. 499. The greater the distance... | |
 | James Howard Gore - 1898 - 232 σελίδες
...equal sides are equal. 509. Tlie arc of a great circle drawn from the vertex of an isosceles spherical triangle to the middle of the base is perpendicular to the base, and bisects the vertical angle. 510. If with the vertices of a spherical triangle as poles arcs of... | |
 | George Clinton Shutts - 1904 - 112 σελίδες
...middle point of the base is perpendicular to the base, the triangle is isosceles. Ex. 29. Prove that a line drawn from the vertex of an isosceles triangle to the middle of the base, (i) bisects the triangle, (2) bisects the vertical angle, (j) is perpendicular to the base. 93. Theorem.... | |
 | Wilbur Fisk Nichols - 1905 - 208 σελίδες
...the base. Prove that BD J- AC, and bisects AC. 3. Using the same figure, prove that the line joining the vertex of an isosceles triangle to the middle of the base is perpendicular to the base, and bisects the angle at the vertex. Prove BD -L AC, and that BD bisects Z B. By conditions, what parts... | |
 | George William Myers - 1906 - 440 σελίδες
...triangle? FIGURE .&, 20. One side of a regular hexagon is 36'. Find the area of the hexagon? 30. A straight line drawn from the vertex of an isosceles triangle to the middle of the _ base is perpendicular to the\ FIGURE 226 base. Find the area of a regular pentagon whose sides are... | |
 | Isaac Newton Failor - 1906 - 440 σελίδες
...three sides of the other." § 172 " being homologous A of equal A." QED 174 COROLLARY 1. The straight line drawn from the vertex of an isosceles triangle to the middle point of the base bisects the vertical angle and is perpendicular to the base. 175 COROLLARY 2. An... | |
 | Isaac Newton Failor - 1906 - 431 σελίδες
...three sides of the other." § 172 " being homologous A of equal A." QED 174 COROLLARY 1. The straight line drawn from the vertex of an isosceles triangle to the middle point of the base bisects the vertical angle and is perpendicular to the base. 175 COROLLARY 2. An... | |
| |
Consequently, a line drawn from the vertex of an isosceles triangle to the middle of the base, bisects the vertical angle, and is perpendicular to the base. 
