Foundations of Geometry

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Instead of determine, we may also employ other forms Of expression; for example, we may say A lies upon a, A is a point of a, a goes through A and through B, a joins A and or with 8, etc. If A lies upon a and at the same time upon another straight line 6, we make use also Of the ex pression: The straight lines a and e have the point A in common, etc.