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" When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle; and the straight line which stands on the other is called a perpendicular to it. "
Euclid, books i. & ii., with notes, examples, and explanations, by a late ... - Σελίδα 1
των Euclides - 1879
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Elements of geometry, based on Euclid, book i

Edward Atkins - 1877
...standing on another straight are equal. line, makes the adjacent angles equal to one another, each of the angles is called a right angle, and the straight line...stands on the other is called a perpendicular to it (Def. 10). Therefore, from the given point C, a perpendicular has been drawn to the given straight...

Natural Philosophy for Beginners: With Numerous Examples, Μέρος 1

Isaac Todhunter - 1877 - 440 σελίδες
...line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle, and the 'straight...stands on the other is called a perpendicular to it. Thus in the figure if the angle ABC is equal to the angle ABD each of them is a right angle, and AB...

The elements of plane geometry, from the Sansk. text of Ayra Bhatta, ed. by ...

Āryabhaṭa - 1878
...straight line. NB In the figure subjoined B is an angle and is thus expressed : " Angle AB 0." A BC XVI. When a straight line standing on another straight...stands on the other is called a perpendicular to it. XVII. An obtuse angle is that which is greater than a right angle. And an acute angle is that which...

Moffatt's pupil teachers' course (ed. by T. Page). Candidates, 2nd (-4th) year

Moffatt and Paige - 1879
...(Def. 15), Therefore the angle FHC is equal to the angle GHC (I. 8), and these are adjacent angles. But when a straight line standing on another straight...a right angle, and the straight line which stands upon the other is called a perpendicular to it (Def. 10). Therefore, from the given point C a perpendicular...

The Elements of Plane and Solid Geometry: With Chapters on Mensuration and ...

Isaac Sharpless - 1879 - 266 σελίδες
...line standing on another straight line makes the adjacent angles equal to each other, each of them is called a right angle, and the straight line which stands on the other is called a perpendicular. 9. An obtuse 1 angle is one that is greater than a right angle. 10. An acute * angle is one that is...

The Elements of Euclid for the Use of Schools and Colleges: With Notes, an ...

Isaac Todhunter - 1880 - 400 σελίδες
...line, standing on another straight line, makes the adjacent angles equal to one another, each of the angles is called a right angle, and the straight line...stands on the other is called a perpendicular to it. [Def. 10. Wherefore a perpendicular CH has been drawn to the given straight line AB from the given...

First principles of Euclid: an introduction to the study of the first book ...

T S. Taylor - 1880
...line, .standing on another straight line, makes the adjacent angles equal to one another, each of the angles is called a right angle. And the straight line •which stands on the other is -A. -0 .* said to be perpendicular to it. Thus the straight line CD is said to stand on the straight...

Class lessons on Euclid

Marianne Nops - 1882
...line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle, and the straight line...angle is that which is greater than a right angle.' 12. 'An acute angle is that which is less than a right angle.' OF FIGURES. 13. ' A term or boundary...

The Elements of Euclid for the Use of Schools and Colleges: Comprising the ...

Euclid, Isaac Todhunter - 1883 - 400 σελίδες
...line, standing on another straight line, makes the adjacent angles equal to one another, each of the angles is called a right angle, and the straight line...stands on the other is called a perpendicular to it. [Def. 10. EUCLID'S ELEMENTS. PROPOSITION 13. THEOREM. The angles which one straight line makes with...

Mensuration for beginners [With] Answers

William Dodds - 1883
...straight line GD, standing on another straight line AB, makes the angle GDA equal to the angle GDB, each of these angles is called a right angle, and the straight line GD, standing on the other AB, is A ' j , ? ni • i_ ii Right Anglo. said to be drawn at right angles...




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