If a Straight Line Be Bisected
All Resolutions
If a straight line be bisected and produced to any point, the rectangle contained by the whole line so increased, and the part produced, together with the square of half the line, is equal to the square of the line made up of the half, and the produced part .
Description:
Page of a geometry textbook showing Euclid’s Elements book II, proposition 6 illustrated with rectangles and lines of various colors.