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This is a 32-page guide for teachers. It contains the definitions, properties and tests for rhombuses, kites and trapezia. Proofs of the properties and tests are given. Constructions for rhombuses, kites and trapezia are provided.
This is a 44-page guide for teachers. It contains theorems on chords, arcs, angles and secants associated with circles.
An interactive applet in which students explore the effect of reflection in a variety of axes.
An animated tutorial about types of polygons and their line symmetries, followed by an interactive quiz.