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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

## Elementary Geometry, Plane and Solid: For Use in High Schools and Academies

Thomas Franklin Holgate - Geometry - 1901 - 460 pages
...Any straight line drawn from the centre to a point on the sphere is called a radius of the sphere. A straight line drawn through the centre and terminated both ways by the sphere is called a diameter of the sphere. The length of a diameter is twice the length of a radius....

## A Text-book of Euclid's Elements for the Use of Schools, Book 1

Euclid - Euclid's Elements - 1904 - 488 pages
...a straight line drawn from the centre to the circumference. I. Def. 17. A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference. I. Def. 18. A semicircle is the figure bounded by a diameter of a circle and the part...

## A School Geometry, Parts 1-4

Henry Sinclair Hall - 1908 - 286 pages
...the circumference. It follows that all radii of a circle are equal. 3. A diameter of a circle is a straight line drawn through the centre and terminated both ways by the circumference. 4. A semi-circle is the figure bounded by a diameter of a circle and the part of the...

## Field and Colliery Surveying: A Primer Designed for the Use of Students of ...

Thomas Aloysius O'Donahue - Mine surveying - 1911 - 288 pages
...straight line drawn from the centre to the circumference, as OC (Fig. 32). The diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference, as AB (Fig. 32). An arc of a circle is any part of the circumference, as EDF (Fig. 32)....

## Practical Geometry & Graphics: A Text-book for Students in Technical and ...

Edward L. Bates, Frederick Charlesworth - Geometry - 1912 - 648 pages
...is employed to make such points conspicuous and more easily located by the reader. A diameter is a straight line drawn through the centre, and terminated both ways by the circumference. FIG. 1. Thus, in Fig. 2, O is the centre of the circle; OA, OB, OC, are radii; AOB is...