THE
ELEMENTS
OF
EUCLID.
BOOK I.
DEFINITIONS.
I.
A Point is that which hath no parts, or which hath no magnitude.
II.
A line is length without breadth.
III.
The extremities of a line are points.
IV.
A ſtraight line is that which lies evenly between its extreme points.
V.
A ſuperficies is that which hath only length and breadth.
VI.
The extremities of a ſuperficies are lines.
VII.
A plain ſuperficies is that in which any two points being taken, the
ſtraight line between them lies wholly in that ſuperficies.
A
“A plain
