SAND MODEL : CIRCLE AREA AND DEMONSTRATION OF π.

SAND MODEL : CIRCLE AREA AND DEMONSTRATION OF π.
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Description

Demonstration model of the formula R = r ² · 3.14. The model is filled with fine sand that fills the one hand the area of the circle and the area of squares. The radius of the circle corresponds to the side length of squares. Made of plastic material.

Approx size : 250x130mm

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