Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Books Books
" A line drawn from the vertex of an isosceles triangle to the middle of the base, is perpendicular to, the base. "
Modern Junior Mathematics - Page 228
by Marie Gugle - 1920
Full view - About this book

An Introduction to the Theory and Practice of Plane and Spherical ...

Thomas Keith - Navigation - 1810 - 478 pages
...II. Hence every equilateral triangle is likewise equiangular, and the contrary. (I) COROLLARY III. A line drawn from the vertex of an isosceles triangle to the middle of the base, is perpendicular to, the base. For the two sides FB and BC are equal to the two...
Full view - About this book

An Introduction to the Theory and Practice of Plain and Spherical ...

Thomas Keith - Navigation - 1826 - 504 pages
...II. Hence every equilateral triangle is likewise equiangular, and the contrary. (I) COROLLARY III. A line drawn from the vertex of an isosceles triangle to the middle of the base, is perpendicular to the base. For the two sides FB and вс are equal to the two...
Full view - About this book

An introduction to the theory ... of plane and spherical trigonometry ...

Thomas Keith - 1839 - 498 pages
...II. Hence every equilateral triangle is likewise equiangular, and the contrary. (315) COROLLARY III. A line drawn from the vertex of an isosceles triangle to the middle of the base, is perpendicular to the base. For the two sides FB and BC are equal to the two...
Full view - About this book

Elements of Geometry and Trigonometry

Adrien Marie Legendre - Geometry - 1863 - 464 pages
...The angle BAD is equal to DAC, and BDA to CDA : hence, the last two are right angles. 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. PROPOSITION XII....
Full view - About this book

Manual of Geometry and Conic Sections: With Applications to Trigonometry and ...

William Guy Peck - Conic sections - 1876 - 376 pages
...equal in all their parts, (P. 11). Hence, the angle A is equal to C, which was to be proved. Cor. 2. A line drawn from the vertex of an isosceles triangle to the middle of the base bisects the angle at the vertex, and is perpendicular to the base. For, from what...
Full view - About this book

Moffatt's pupil teachers' course (ed. by T. Page). Candidates, 2nd (-4th) year

Moffatt and Paige - 1879 - 474 pages
...than two right angles. (21)- Draw a triangle which shall be equal to two other given triangles. (22) A line drawn from the vertex of an isosceles triangle to the middle point of the base is at right angles to it. (23) A line making equal angles with the sides of...
Full view - About this book

Chauvenet's Treatise on Elementary Geometry

William Chauvenet - Geometry - 1887 - 336 pages
...to the included angle EGF. Hence the triangles are equal, by Proposition VI. EXERCISE. Theorem.— A line drawn from the vertex of an isosceles triangle to the middle point of the base is perpendicular to the base, and bisects the vertical angle. PROPOSITION...
Full view - About this book

A Text-book of Geometrical Deductions

James Andrew Blaikie, William Thomson - Geometry - 1891 - 160 pages
...the previous Ex. and § 1, Ex. 2. § 3. (BookworTc, EUCLID, I. 1-8.) 1. The straight line which joins the vertex of an isosceles triangle to the mid-point of the base, bisects the vertical angle and is perpendicular to the base. Let ABC be an isosceles triangle having...
Full view - About this book

Plane and Solid Geometry: Suggestive Method

Charles Ambrose Van Velzer, George Clinton Shutts - Geometry - 1894 - 416 pages
...with the middle point of the base is perpendicular to the base, the triangle is isosceles. Ex. 24. Prove that a line drawn from the vertex of an isosceles triangle to the middle point of the base, (1) bisects the triangle, (2) bisects the vertical angle, (3) is perpendicular...
Full view - About this book

Mathematics for Common Schools: A Manual for Teachers, Including Definitions ...

John Henry Walsh - 1896 - 282 pages
...it 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...
Full view - About this book




  1. My library
  2. Help
  3. Advanced Book Search
  4. Download EPUB
  5. Download PDF