MATHEMATICAL TEXTS

FOR SCHOOLS AND COLLEGES

EDITED BY

PERCEY F. SMITH, PH.D.

PROFESSOR OF MATHEMATICS IN THE SHEFFIELD SCIENTIFIC SCHOOL OF YALE UNIVERSITY

NATIONAL CAPITOL, WASHINGTON, D.C.

This building illustrates the use of geometrical forms in architecture

PLANE AND SOLID

GEOMETRY

BY

WILLIAM BETZ, A.M.

VICE PRINCIPAL AND HEAD OF THE DEPARTMENT OF MATHEMATICS
IN THE EAST HIGH SCHOOL, ROCHESTER, NEW YORK

AND

HARRISON E. WEBB, A.B.

HEAD OF THE DEPARTMENT OF MATHEMATICS IN THE CENTRAL
COMMERCIAL AND MANUAL TRAINING HIGH SCHOOL
NEWARK, NEW JERSEY

WITH THE EDITORIAL COOPERATION OF

PERCEY F. SMITH

PROFESSOR OF MATHEMATICS IN THE SHEFFIELD SCIENTIFIC
SCHOOL OF YALE UNIVERSITY