Text-book of Euclid's elements for the use of schools : books I - VI and XI (1900)
Hall, H. S. (Henry Sinclair), 1848-1934, Stevens, F. H. (Frederick Haller), 1853-1933 · MacMillan : London · leaf 109
e ADE is a right angle.And the opposite angles of a parallelogram are equal; I. 34..*. each of the angles DEB, EBA is a right angle : that is the figure ADEB is rectangular.Hence it is a square, and it is described on AB. Q.E.F. Corollary. If one angle of a parallelogram is a rightangle, all its… … Let ABC be a right-angled triangle, having the angleBAC a right angle. Then shall the square described on the hypotenuse BC beequal to the sum of the squares described on BA, AC. Construction. On BC describe the square BDEC ; L 46.and on BA, AC describe the squares BAGF, ACKH. Through A draw AL…
Geometry · Mathematics
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