Experiencing geometry :
Henderson, David W.
Experiencing geometry : on plane and sphere / Experiencing geometry on plane and sphere. by David W. Henderson ; with writing input from Eduarda Moura ... [et al.]. - Englewood Cliffs, N.J. : Prentice Hall, 1996. - xxiv, 193 p. : ill. ; 24 cm.
Includes bibliographical references (p. 177-188) and index.
Straightness and symmetry--Straightness on a sphere--What is an angle?--Straightness on cylinder and cone.
0133737705
Geometry.
Experiencing geometry : on plane and sphere / Experiencing geometry on plane and sphere. by David W. Henderson ; with writing input from Eduarda Moura ... [et al.]. - Englewood Cliffs, N.J. : Prentice Hall, 1996. - xxiv, 193 p. : ill. ; 24 cm.
Includes bibliographical references (p. 177-188) and index.
Straightness and symmetry--Straightness on a sphere--What is an angle?--Straightness on cylinder and cone.
0133737705
Geometry.