Page:The Elements of Euclid, viz. the first sixs books, together with eleventh and twelfh.djvu/11



Point is that which hath no parts, or which hath no magnitude.

A line is length without breadth. The extremities of a line are points.

A traight line is that which lies evenly between its extreme points.

A uperficies is that which hath only length and breadth.

The extremities of a uperficies are lines.

A plain uperficies is that in which any two points being taken, the traight line between them lies wholly in that uperficies. Rh