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" From any point in the base of an isosceles triangle perpendiculars are drawn to the sides ; prove their sum to be equal to the perpendicular drawn from either basal vertex to the opposite side. "
Text-book of Elementary Plane Geometry - Σελίδα 32
των Julius Petersen - 1880 - 73 σελίδες
Πλήρης προβολή - Σχετικά με αυτό το βιβλίο

Text-book of Elementary Plane Geometry

Julius Petersen - 1880 - 104 σελίδες
...line, equal to the part cut off a line perpendicular to this, by the other two opposite sides. 7o. In a right-angled triangle squares are described on...inscribed in a circle, and which can be circumscribed? 73. Prove that a polygon can be constructed, when all its parts are known, except three, which follow...

The Eclectic School Geometry: A Revision of Evan's School Geometry

Evan Wilhelm Evans - 1884 - 170 σελίδες
...one segment shall equal twice the angle contained in the other segment. Apply Ex. 24. 30. If from any point in the base of an isosceles triangle perpendiculars are drawn to the sides, their sum is constantly equal to the perpendicular from either angle at the base to the...

Numerical Problems in Plane Geometry: With Metric and Logarithmic Tables

Joe Garner Estill - 1896 - 186 σελίδες
...ENTRANCE EXAMINATION PAPERS OF A NUMBER OF THE LEADING COLLEGES AND SCIENTIFIC SCHOOLS. 1. From any point in the base of an isosceles triangle perpendiculars are drawn to the sides ; prove their sum to be equal to the perpendicular drawn from either basal vertex to the...

Numerical Problems in Plane Geometry with Metric and Logarithmic Tables

Joe Garner Estill - 1896 - 168 σελίδες
...ENTRANCE EXAMINATION PAPERS OF A NUMBER OF THE LEADING COLLEGES AND SCIENTIFIC SCHOOLS. 1. From any point in the base of an isosceles triangle perpendiculars are drawn to the sides ; prove their sum to be equal to the perpendicular drawn from either basal vertex to the...

Elements of Geometry

George Washington Hull - 1897 - 408 σελίδες
...perpendiculars drawn from the vertices of the equal angles of an isosceles triangle are equal. 74. If from any point in the base of an isosceles triangle perpendiculars are drawn to the sides, their sum is equal to the perpendicular from the vertex to the opposite side. D, 76. The...

Plane and Solid Geometry

William James Milne - 1899 - 396 σελίδες
...the diagonals are equal and two sides are parallel, the other sides are equal. Ex. 25. If from any point in the base of an isosceles triangle perpendiculars are drawn to the equal sides, their sum is equal to the perpendicular drawn from either extremity of the base to...

Key to Milne's Plane and Solid Geometry

William James Milne - 1899 - 326 σελίδες
...CAB, and since AE = AC, and, § 153, ED = AB, § 100, &ADE = Д ABC, and AD = BG. Ex. 25. If from any point in the base of an isosceles triangle perpendiculars are drawn to the equal sides, their sum is equal to the perpendicular drawn from either extremity of the base to...

The American Mathematical Monthly: Devoted to the Interests of ..., Τόμοι 1-2

Benjamin Franklin Finkel - 1894 - 908 σελίδες
...from Todhwntei'a Plane Trigonometry.] t. PnyoMd fcy ADOLPH BAILOIT, Dvrud, WiioomiB. If from a varible point in the base of an isosceles triangle, perpendiculars are drawn to the sides, tbe sum of the perpendicular is constant and equal to the perpendicular let fall from either...




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