ELEMENTS

OF

GEOMETRY:

CONTAINING

THE FIRST SIX BOOKS OF EUCLID,

WITH A

SUPPLEMENT

ON THE

QUADRATURE OF THE CIRCLE, AND THE
GEOMETRY OF SOLIDS:

TO WHICH ARE ADDED,

ELEMENTS OF PLANE AND SPHERICALE
TRIGONOMETRY.

BY

JOHN PLAYFAIR, F.R.S. LOND. & Edin.

PROFESSOR OF NATURAL PHILOSOPHY, FORMERLY OF MATHEMATICS, IN THE
UNIVERSITY OF EDINBURGH.

FROM THE LAST LONDON EDITION, ENLARGED.

D

PHILADELPHIA:

J. B. LIPPINCOTT & CO.

1856.