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| 4.47 |
Instrument for Measurement of Angles |
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A thick white and green metal plate calibrated in 360 degrees
for positioning a fraction piece to be measured. |
| 4.48 |
Cut-Out Labeled Fraction Circles |
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The red whole and cut-out labeled circles are stored in a
wooden box with 10 compartments. |
| 4.50 |
Yellow Triangles for Area |
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A beech wood box containing yellow, square rules figures for
the area exercises. |
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