Includes bibliographical references (pages [258]-260) and index.
Invariance - Language and points of view -- Reasoning based on invariant properties -- Visualising and representing -- Invariance in measurement -- Measuring areas and volumes -- Geometrical reasoning -- Visualising -- Transformations and invariants -- Language and points of view -- Reasoning with transformation geometry -- Visualising transformations -- Themes and structure -- Powers, constructs and strategies -- Epilogue -- References -- Index -- CD-ROM: Interactive geometry files -- Audio files - imaginings -- Paper resources