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THE angles at the base of an isosceles triangle are equal to one another : and, if the equal sides be produced, the angles upon the other side of the base shall be equal.
The examination papers as set for the preliminary literary examination of ... - Σελίδα 8
των Royal college of surgeons of England - 1860
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## Annual Report

...from the top. What is the height of the trees ? 8 8 8 15 20 10 15 GEOMETRY. 1. The angles at the base1 of an isosceles triangle are equal to one another,...produced, the angles on the other side of the base are equal. 2. Prove the above proposition by the principle of superposition without using any construction...

## The Passenger from Scotland Yard

H. Freeman Wood - 1888 - 398 σελίδες
...the moment, in the Wilmot affair. The passenger from Scotland Yard went on to prove that the angles at the base of an isosceles triangle are equal to one another, and that, if the equal sides be produced, the angles on the other side of the base shall be equal to one...

## Pacific Educational Journal

1888
...words, " He that walketh with wise men shall be wise." The boy that has learned to prove that the angles at the base of an isosceles triangle are equal to one another — especially if he has learned it after Euclid — has made a certain gain in mental power. The boy...

## The Encyclopaedia Britannica: A Dictionary of Arts, Sciences, and ..., Τόμος 23

1888
...attributed to Thalee : — (1) the circle is bisected by i ta character (Proel , op, eu., p. 157) ; (2) the angles at the base of an isosceles triangle are equal (Id. , p. 260) ; (8) when two straight lines cut each other the vertically opposite angles are equal...

## Logic: Or, The Morphology of Knowledge, Τόμος 1

Bernard Bosanquet - 1888 - 638 σελίδες
...The square of Figures. the hypotenuse is equal to the squares of the containing sides.' ' The angles at the base of an isosceles triangle are equal to one another.' Such judgments as these are among the simplest results of mediate enumeration 1 as applied to space,...

## Woolwich Mathematical Papers for Admission Into the Royal Military Academy ...

E. J. Brooksmith - 1889
...axiom of Euclid respectively used for the first time ? What axioms are used in Prop. 1 V., Book I. ? 2. The angles at the base of an isosceles triangle...angles on the other side of the base shall be equal to one another. State fully the converse of this proposition. 3. If one side of a triangle be produced,...

## Practical Surveying: A Text-book for Students Preparing for Examinations Or ...

George William Usill - 1889 - 272 σελίδες
...equal sides are opposite. 2. The angles at the base of an isosceles triangle, ABC and A c B, TRIANGLES. are equal to one another ; and if the equal sides...produced the angles on the other side of the base, DBC and B c E, shall be equal to one another. 8. If two triangles have two sides of the one equal to...

## The Harpur Euclid: An Edition of Euclid's Elements

Edward Mann Langley, W. Seys Phillips - 1890 - 515 σελίδες
...its sides equal to each other is called an 'isosceles' triangle. PROPOSITION 5. THEOREM. The angles at the base of an isosceles triangle are equal to...angles on the other side of the base shall be equal to one another. Let ABC be an isosceles triangle, having the side AB equal to the side AC, and let...

## Report of the Secretary for Public Instruction ...

...angle. For Admission as Pupil-Teacher of the Fourth Class. (One hour and a-half allowed.) 1. The angles at the base of an isosceles triangle are equal to one another. [Let DEF be the triangle, and use the following construction : — In DE take any point G, and from...

## Rider Papers on Euclid: Books i and Ii, Graduated and Arranged in Order of ...

Rupert Deakin - 1891 - 79 σελίδες
...angles shall be equal, each to each, namely those to which the equal sides are opposite. 5. The angles at the base of an isosceles triangle are equal to...angles on the other side of the base shall be equal to one another. 6. If two angles of a triangle be equal, the sides also which subtend, or are opposite...