T H E E L E M E N T S |
Book I Proposition 29 | |
Let the straight line EF fall on the parallel straight lines AB, CD. I say that it makes the alternate angles AGH, GHD equal, the exterior angle EGB equal to the interior and opposite angle GHD, and the interior angles on the same side, namely BGH, GHD, equal to two right angles. |
||
Return to Propositions Next Page |