Set of 2 black wooden plates measuring 14 x 14 x 1 cm.
The Instrument For The Measurement of Angles is calibrated in 360 degrees for positioning a fraction piece from our 4.45 Fraction Circles to demonstrate how angles are measured in degrees.
The Centisimal Frame is calibrated from 0 to 100, and is used with 4.45 Fraction Circles to demonstrate how fractions may be reduced to decimal fractions.
Reviews for Instrument For The Measurement of Angles and The Centisimal Frame