Relfe brothers' Euclid sheets, propositions 1-26, book 1

adjacent angles angle angle angle coincide angle contained angle is equal angle is greater angle RELFE BROTHERS angles two right base is equal BOOK CHARTERHOUSE BUILDINGS circle cutting common demonstrated describe the circle describe the equilateral distance describe divide draw a straight draw the straight drawn ends equal angles equal sides equal to angle equilateral triangle EUCLID SHEETS exterior angle extremity fall given point given rectilineal angle given straight line greater angle greater side Hence impossible included angle interior and opposite join Let two sides likewise the angles line RELFE BROTHERS LONDON manner meeting namely possible PROPOSITIONS 1-26 proved equal PUBLISHED remaining angles right angles side be produced sides are opposite sides equal SIMILAR FORM straight line equal straight line RELFE take any point terminated thing are equal third angle three angles three given straight three straight lines triangle are greater triangle coincide triangle is equal vertex wherefore the angle