COMMENT ā VALID 00002 PAGES C REC PAGE DESCRIPTION C00001 00001 C00002 00002 GLOSSARY. C00004 ENDMK Cā; GLOSSARY. GEOMETRY The word literally means earth measure. NOTION A vague idea. THEORY A body of statements presenting a systematic view of a subject. FILM A sequence of images. MODEL A description; a mathematical description of an entity or a state of affairs. SIMPLY CONNECTED