 | Charles Davies, William Guy Peck - 1855 - 628 σελίδες
...Theorem depends upon the principles of combinations. PER-PEN-DIC'U-LAR. [L. per and ptnJco. to hang]. When one straight line meets another straight line, so as to make the two angles formed equal to each other, the ' lines are said to be perpendicular to each other. A *•"... | |
 | George Albert Wentworth - 1877 - 436 σελίδες
...sides of the other) ; = Z AOB, (being homologous A of equal A ) ; .'. ZAOE and ZA 0 B are rt. A § 25 ( When one straight line meets another straight line so as to make the adj. A equal, each ¿is a rt. Z ). QED PROPOSITION XLIV. THEOREM. 140. Two parallelograms, having two... | |
 | George Albert Wentworth - 1877 - 426 σελίδες
....-.Z AOE = Z. AOB, (being homologous A of equal Д ) ; .'. ZAOE and ZA 0 B .aro rt. A. § 25 ( Wlun one straight line meets another straight line so as to make the adj. A equal, each Zis a rt. ¿ ). a ED PROPOSITION XLIV. THEOREM. 140. Two parallelograms, having... | |
 | George Albert Wentworth - 1879 - 262 σελίδες
...to three sides of the other) ; (being homologous A of equal & ) ; .'.Z AOE&ndZ A OB avert. A. §25 ( When one straight line meets another straight line so as to make the adj. A equal, each Zis a rt. Z ). QED PROPOSITION XLIV. THEOREM. 140. Two parallelograms, having two... | |
 | Alfred Hix Welsh - 1883 - 326 σελίδες
...C and the common side _ CF, are adjacent; also, in the annexed u figure, the angles ACB and BCD. 8. When one straight line meets another straight line so as to make the adjacent angles equal, each of these angles is a Right Angle, and the first line is said to \>& perpendicular... | |
 | Charles Scott Venable - 1888 - 402 σελίδες
...have the same direction, being everywhere equally distant, B._ ^^ parallel lines ; as A and B. 926. If one straight line meets another straight line so as to make the two angles equal, each angle is called a right angle, and the one line is said to be perpendicular... | |
 | John H. Macke - 1891 - 244 σελίδες
...sides separate equally, although the sides of the latter are longer than those of the former. 1l 11. When one straight line meets another straight line, so as to make two adjacent angles equal to one another, each of these angles is called a right angle, and the first... | |
 | John William Hopkins, Patrick Healy Underwood - 1903 - 560 σελίδες
...angle EAC, or arms of the angle BAC. The point A is called the vertex of the angle. ARITHMETIC 179. If one straight line meets another straight line so as to make the adjacent angles equal to each other, each angle is called a right angle. S M If the lines MN, ST meet... | |
 | Arthur Wesley Chase - 1904 - 200 σελίδες
...are placed at the extremities of the sides and the third is placed at the vertex. Figure 46 shows the angle ABC. In reading an angle the letter designating...Thus in Figure 47, GE is a perpendicular to D F. Also UF is a perpendicular to G E. It will be evident by considering Figure 47 that two right angles and... | |
 | John William Hopkins - 1907 - 376 σελίδες
...amount of turning necessary to bring one side into coincidence with the other. COMPOUND QUANTITIES If one straight line meets another straight line so as to make the adjacent angles equal to each other, each angle is called a right angle. s If the lines MN, ST meet... | |
| |
A right angle is formed when one straight line meets another straight line so as to make the adjaFigure 47. 