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" A rhombus is that which has all its sides equal, but its angles are not right angles. "
The First Six Books with Notes - Página 3
por Euclid - 1822 - 179 páginas
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A Text-book of Euclid's Elements for the Use of Schools, Books I.-IV.

Henry Sinclair Hall, Frederick Haller Stevens - 1900 - 304 páginas
...every triangle must have at least two acute, anyles. ] QUADRILATERALS. 30. A square is a four.sided figure which has all its sides equal and all its angles right angles. [It may be shewn that if a quadrilateral has all its sides equal and one angle a right angle, then...
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Workshop Mathematics, Parte1

Frank Castle - 1900
...the opposite side, but is also perpendicular to the two adjacent sides. A square is a parallelogram which has all its sides equal, and all its angles right angles. A rhombus is a parallelogram having all its sides equal, but its angles are not right angles. A trapezium...
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Euclid, His Life and System

Thomas Smith (D.D.) - 1902 - 227 páginas
...axiomatic truth; and that he might just as well have defined an equilateral triangle as a three-sided figure which has all its sides equal and all its angles right angles. It happens, indeed, that the square as defined does exist, and the triangle as so defined does not...
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A Text-book of Euclid's Elements for the Use of Schools, Libro 1

Euclid - 1904 - 456 páginas
...triangle is a triangle which has three acute angles. QUAD RILATE RA IS. 30. A square is a four-sided figure which has all its sides equal and all its angles right angles. [It may be shewn that if a quadrilateral has all its sides equal and one angle a right angle, then...
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The Sheet-Metal Worker's Instructor

R. H. Warn, J. G. Horner - 2002 - 284 páginas
...being necessarily acute angles, since they make up the other right angle together. 29. A square is that which has all its sides equal, and all its angles right angles (Fig. 9). C. ,3 C Fig. 8. Fig. 9. 30. An oblong is that which has all its angles right angles, but...
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A First Course of Geometry

...quadrilateral is a straight line joining a pair of opposite angular points. A square is a quadrilateral which has all its sides equal and all its angles right angles (6)*. DEF. 9. A rhombus is a quadrilateral which has all its sides equal and its angles not right angles...
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The Elements of Plane Geometry

Euclid - 1845 - 262 páginas
...noticed that the letters denoting a quadrilateral should be given in order.) A square is a quadrilateral which has all its sides equal and all its angles right angles (ii)*. DBF. 14. A rhombus is a quadrilateral which has all its sides equal and its angles not right...
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