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- This tangram represents Irregular Quadrilateral, tangrams gives students an opportunity to use a manipulative set to construct understanding of geometric ideas and develop spatial skills., vintage line drawing or engraving illustration. Puzzle #395700684
This tangram represents Irregular Quadrilateral, tangrams gives students an opportunity to use a manipulative set to construct understanding of geometric ideas and develop spatial skills., vintage line drawing or engraving illustration. Puzzle #395700684