Books Books
Of three-sided figures, an equilateral triangle is that which has three equal sides.
Mensuration of Lines, Areas, Surfaces, and Volumes ... - Page xiv
by Robert Rawson - 1856

## Euclid's Elements [book 1-6] with corrections, by J.R. Young

Euclides - 1838 - 264 pages
...four straight lines. XIX. Multilateral figures, or polygons, by more than four straight lines. XX. Of three-sided figures, an equilateral triangle is that / \ which has three equal sides. ^/ \^ XXI. An isosceles triangle is that which has two sides equal. XXII. A scalene triangle is that...

## The Elements of Euclid: The Errors, by which Theon, Or Others, Have Long Ago ...

Robert Simson - Geometry - 1838 - 434 pages
...figures, or triangles, by three straight lines. XXII. Quadrilateral, by four straight lines. XXIII. Multilateral figures, or polygons, by more than four straight lines. XXIV. Of three sided figures, an equilateral triangle is that which has three equal sides. XXV. An isosceles...

## The Elements of Euclid; viz. the first six books,together with the eleventh ...

Euclides - Geometry - 1841 - 378 pages
...or triangles, by three straight lines. XXII. Quadrilateral figures, by four straight lines. XXIII. Multilateral figures, or polygons, by more than four...A scalene triangle is that which has three unequal sides. XXVII. A right-angled triangle is that which has a right angle. XXVIII. An obtuse angled triangle...

## Elements of geometry: consisting of the first four,and the sixth, books of ...

Euclides - 1842 - 316 pages
...figures, or triangles, by three straight lines. XXII. Quadrilateral, by four straight lines. XXIII. Multilateral figures, or polygons, by more than four...A scalene triangle is that which has three unequal sides. XXVII. A right-angled triangle is that which has a right angle. XXVIII. An obtuse-angled triangle...

## A course of practical geometry for mechanics

William Pease - Geometry - 1843 - 80 pages
...60 degrees. The three angles of any triangle, are together equal to two right angles or 180 degrees. XXV. An isosceles triangle is that which has only two sides equal. Two of its angles are equal, namely, those opposite to the equal sides. XXVI. A scalene triangle is...

## Euclid in Paragraphs: The Elements of Euclid: Containing the First Six Books ...

Euclid - Geometry - 1845 - 218 pages
...contained by straight lines. XXI. Trilateral figures, or triangles, by three straight lines. XXII. XXIII. Multilateral figures, or polygons, by more than four...scalene triangle, is that which has three unequal sides. XXVII. A right-angled triangle, is that which has a right angle. XXVIII. An obtuse-angled triangle,...

## Euclid's Elements of geometry [book 1-6, 11,12] with explanatory notes ...

Euclides - 1845 - 546 pages
...figures, or triangles, by three straight lines. XXII. Quadrilateral, by four straight lines. XXIII. Multilateral figures, or polygons, by more than four...sides. XXV. An isosceles triangle is that which has two sides equal. XXVI. A. scalene triangle is that which has three unequal sides. XXVII. A right-angled...

## The Elements of Geometry, Symbolically Arranged

Great Britain. Admiralty - Geometry - 1846 - 128 pages
...figures, or triangles, by three straight lines. XXII. Quadrilateral, by four straight lines. XXIII. Multilateral figures, or polygons, by more than four...A scalene triangle is that which has three unequal sides. XXVII. A right-angled triangle is that which has a right angle; and the side opposite the right...