| 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... | |
| 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... | |
| 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... | |
| 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... | |
| 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... | |
| ...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... | |
| 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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