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" 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
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The First Book of Euclid's Elements, Simplified, Explained, and Illustrated ...

Euclides - 1847 - 128 pages
...angulus; and many.sided figures, polygons, from the Greek words iro\v, many, and yiavia, an angle. 23. Of three.sided figures, an equilateral triangle is that which has three equal sides. 24. An isosceles triangle is that which has only two sides equal. The word isosceles is derived from...
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The definitions, postulates, axioms, and enunciations of the propositions of ...

Euclides - 1848 - 52 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...
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The first three books of Euclid's Elements of geometry, with theorems and ...

Euclid, Thomas Tate - 1849 - 120 pages
...figures, or triangles, by three straight lines. xxn. Quadrilateral, by four straight lines. XXIII. Multilateral figures, or polygons, by more than four...isosceles triangle is that which has only two sides equal. A XXVI. A scalene triangle, is that which has three unequal sides. xxvn. A right angled triangle, is...
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The first two books of the Elements of Euclid, with additional figures ...

Euclides - 1852 - 152 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. [Observe that an equilateral triangle must be isosceles, B 4 BOOK I. BOOK I. but that...
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The synoptical Euclid; being the first four books of Euclid's Elements of ...

Euclides - 1853 - 146 pages
...Trilateral figures, or triangles, by three straight lines. mi. 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...
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The first six books of the Elements of Euclid, with numerous exercises

Euclides - 1853 - 176 pages
...three straight lines. XXII. Quadrilateral, by four straight lines. XXIII. Multilateral figures, от polygons, by more than four straight lines. XXIV....triangle is. that which has only two sides equal. Equilateral. Isosceles. Scalene. XXVI. A scalene triangle is that which has three unequal sides. XXVII....
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The geometry, by T. S. Davies. Conic sections, by Stephen Fenwick

Royal Military Academy, Woolwich - Mathematics - 1853 - 400 pages
...by four straight lines. 23. Multilateral figures, or polygons, by more than four straight lines. 24. Of three-sided figures, an equilateral triangle is that which has three equal sides. 25. An isosceles triangle is that which has two sides equal. 26. A scalene triangle is that which has...
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The Elements of geometry; or, The first six books, with the eleventh and ...

Euclides - 1855 - 262 pages
...Mutilateral [that is, many-sided] figures, or polygons, [that is, manyangled, are those which are contained] by more than four straight lines. XXIV. Of three-sided figures, an equilateral [that is, equal-sided] triangle is that which has three equal sides. XXV. An isosceles [that is, equal-kgged...
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A course of practical geometry for mechanics

William Pease - 1856 - 108 pages
...polygon. The three angles of any triangle are together equal to two right angles, or 180 degrees. 44*. Of three-sided figures, an Equilateral Triangle is that which has three equal sides. Its three angles are also equal to one another, and each contains 60 degrees. 45*. An Isosceles Triangle...
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Euclid's Elements of Geometry: Chiefly from the Text of Dr. Simson, with ...

Robert Potts - Geometry, Plane - 1860 - 380 pages
...Trilateral figures, or triangles, by three straight lines. XXII. Quadrilateral, by four straight lines. xxm. Multilateral figures, or polygons, by more than four...sides. XXV. An isosceles triangle is that which has two sides equal. XXVL A scalene triangle is that which has three unequal sides. xxvn. A right-angled...
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