Plane geometry, with problems and applications (1910)
Slaught, H. E. (Herbert Ellsworth), 1861-1937, Lennes, N. J. (Nels Johann), 1874- joint author · Boston, Allyn and Bacon · leaf 237
. ABCDis a square and the points £, F, G, H,are so taken that AE =: AH ^ CF = CG. Provethat EFGH is a rectangle of constant perimeter,whatever the length of AE. 19. The bisectors of the exterior angles ofa parallelogram form a rectangle the sum ofthe diagonals of which is the same as thesum of the…
Geometry, Plane
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