Constructive Blue Triangles

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A wooden box with lid containing 12 blue right-angled scalene triangles painted on both sides. The Constructive Blue Triangles are used in the elementary Montessori classroom to ex plore equivalency, congruency and similarity. We have Pattern Cards (PDF) for working with this set. Box dimensions: 15.5 cm x 12 cm x 4.3 cm. Recommended ages: 3–6 years. Show more