 | George Darley - 1836 - 172 sider
...complete. NOTF S. This is a theorem, and should not be assumed, as it is in Euclid's definition of a circle, viz.: " A circle is a plane figure bounded by one line, such that all right lines drawn from a certain point within the fi9ure to the circumference, are equal... | |
 | Āryabhaṭa - 1878 - 100 sider
...if ADC do not coincide with ABC, let them stand as indicated. Join FD, and produce FD to B. Because a circle is a plane figure bounded by one line and is such that all straight liues drawn from the centre to the circumference are equal (Def. 6), therefore all the straight... | |
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A circle is a plane figure bounded by one line, and is such that all right lines drawn from its centre to the circumference are equal to one another. 