 | American periodicals - 1884 - 862 pages
...XV. A circle [cone of revolution with vertex at the eye] is a figure contained by one line [surface] which is called the circumference, and is such that all straight lines [angles] drawn from a certain point within the figure to the circumference are equal to one another.... | |
 | Thomas Henry Eagles - 1885 - 404 pages
...times the square on CB. CHAPTER II. THE CIRCLE. EUCLID'S well known definition is " A circle is a plane figure •contained by one line, which is called the...figure to the circumference are equal to one another : and this point is called the centre of the circle". A radius of a circle is a straight line drawn... | |
 | Euclid, John Casey - Euclid's Elements - 1885 - 340 pages
...circle is a plane figure formed by a curved line called the circumference, and is such that all right lines drawn from a certain point within the figure to the circumference are equal to one another. This point is called the centre. xxxin. A radius of a circle is any right line drawn from the centre... | |
 | Euclides - 1885 - 340 pages
...circle is a plane figure formed by a curved line called the circumference, and is such that all right lines drawn from a certain point within the figure to the circumference are equal to one another. This point is called the centre. xxxm. A radius of a circle is any right line drawn from the centre... | |
 | Wellington Salop, old hall sch - 1885 - 204 pages
...only length and breadth." We next discover that "a circle is a figure contained by straight lines, and is such that all straight lines drawn from a certain point within that circle are equal." We are sorry to say that the inventor of this forgot to draw a figure. We have... | |
 | Association for the Improvement of Geometrical Teaching - Euclid's Elements - 1888 - 208 pages
...rectangle AP, PB together with the square on PQ. DEFINITIONS , OF BOOK III. DEF. i. A circle is a plane figure contained by one line, •which is called the...circumference, and is such that all straight lines drawn front a certain point within the figure to the circumference are equal to one another. This point is... | |
 | George William Usill - Surveying - 1889 - 306 pages
...angle. 6. Acute Angle. — An acute angle is less than a right angle. 7. Circle. — A circle is a plane figure contained by one line, which is called the circumference, and is such that all lines drawn from a certain point within the figure to the circumference are equal to one another. 8.... | |
 | James McCosh - Metaphysics - 1889 - 390 pages
...any length in a straight line ; " " There may be such a figure as a circle, that is, a plane figure such that all straight lines drawn from a certain point within the figure are equal to one another ; " and that " A circle may be described from any centre at any distance from... | |
 | Edward Mann Langley, W. Seys Phillips - 1890 - 538 pages
...boundaries. A figure contained by three Straight lines is called a triangle. 15. A circle is a plane figure contained by one line, which is called the...within the figure to the circumference are equal. 16. This point is called the centre of the circle, and the straight line drawn from the centre to the... | |
 | Euclid - Geometry - 1892 - 460 pages
...said to be equal in area, when they enclose equal portions of a plane surface. 11. A circle is a plane figure contained by one line, which is called the...figure to the circumference are equal to one another : this point is called the centre of the circle. A radius of a circle is a straight line drawn from... | |
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A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another : XVI. 
