Congruent Shapes

posted Mar 7, 2016, 12:15 PM by Patrick Johnson
Today students learned about congruent shapes. Shapes are said to be congruent if one shape can become another using reflections (flips), translations (slides) or rotations (turns). The shapes are the same size and the same shape.

Step 1: Students played the Yes/No game (concept attainment) to try and figure out what the yes shapes had in common that made them different from the no shapes. Each pair of YES shapes were this math concept and each pair of the NO shapes were not that math concept.

Step 2: Students used testers to see whether their prediction was correct.

Step 3: After the testers, students made predictions of what math concept the YES pairs had.
Some sample  responses:
-Some of the shapes are reflections of each other
-If you turned a shape, you can fit it over another shape
-The shapes are congruent (a student remembered learning about congruent shapes in their Gr.2/3 class last year).