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" ... is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another : 16. And this point is called the centre of the circle. "
A Series on Elementary and Higher Geometry, Trigonometry, and Mensuration ... - Page 197
by Nathan Scholfield - 1845
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Euclid for beginners, books i. and ii., with simple exercises by F.B. Harvey

Euclides, Frederick Burn Harvey - Geometry - 1880 - 170 pages
...obtuse angle contains more, and an acute angle less, than 90 degrees. 16. A DIAMETER OF A CIRCLE is a straight line drawn through the centre, and terminated both ways by the circumference. Thus BAG and DAE are diameters. A straight line drawn in a circle, not through the centre,...
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The Elements of geometry; or, The first six books, with the eleventh and ...

Euclides - Euclid's Elements - 1881 - 236 pages
...drawa from the centre to ihe circumference, ie called the radios. XVII. A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference. XVIII. A semicircle is the figure contained by a diameter and the part of ths circumference...
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National Arithmetic; Oral and Written: For Common and Graded Schools ...

Joseph Ficklin - Arithmetic - 1881 - 406 pages
...circle is a straight line drawn from the centre to the circumference. The Diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference. WRITTEN EXERCISES. 617. To find the area of a triangle. 1st. When the base and altitude...
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The Elements of Plane and Solid Geometry: With Chapters on Mensuration and ...

Isaac Sharpless - Geometry - 1882 - 292 pages
...These lines are called radii, and this point is the centre of the circle. 32. A diameter of a circle is any straight line drawn through the centre, and terminated both ways by the circumference. 33. A semicircle is the figure contained by the diameter and the part of the circumference...
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Class lessons on Euclid

Marianne Nops - 1882 - 278 pages
...resembles). 16. ' And this point is called the centre of the circle.' 17. ' A diameter of a circle is a straight line drawn through the centre and terminated both ways by the circumference ' (equal in length to two radii). 1S. ' A semicircle is the figure contained by a diameter,...
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Mensuration for beginners [With] Answers

William Dodds - 1883 - 202 pages
...to the circumference. 0 A is a radius ; 0 D and 0 G are also radii. 98. A diameter of a circle is a straight line drawn through the centre and terminated both ways by the circumference. A 0 is a diameter. The diameter is of course twice the length of tlio radius. The circumference...
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Syllabus of plane geometry, books 1-3, corresponding to Euclid, books 1-4 ...

Mathematical association - 1883 - 86 pages
...is a straight line drawn from the centre to the circumference. DEF. 10. A diameter of a circle is a straight line drawn through the centre and terminated both ways by the circumference. [An angle is a simple concept incapable of definition, properly so called, but the nature...
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Geometry for schools, comprising books i. and ii. of Euclid, with some ...

Euclides - 1883 - 176 pages
...of a circle, radii of the same circle are all equal to one another. 13. A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference. 14. A semicircle is the figure enclosed by a diameter and the part of the circumference...
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The Elements of Plane Geometry ...

Association for the improvement of geometrical teaching - Geometry, Modern - 1884 - 150 pages
...is a straight line drawn from the centre to the circumference. DEF. 43. A diameter of a circle is a straight line drawn through the centre and terminated both ways by the circumference. It follows from the definition of a circle that a point is within * NOTE. — Euclid...
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The Elements of Euclid, books i. to vi., with deductions, appendices and ...

Euclides - 1884 - 434 pages
...the circumference. Thus OA, OB, OC, &c. are radii of the circle ACF. 18. A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference. Thus in the preceding figure BF is a diameter of the circle ACF. RECTILINEAL FIGURES....
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