Staedtler Mars Geometry Set Square 16cm

Staedtler 16cm Geometry Set Square. A useful and versatile piece of equipment, offering a protractor, ruler and 45° square in one. The ruler along the hypotenuse is gradutaed in mm and runs from 0 to 7cm from the centre in both directions. The protractor scale runs from 0 to 180 and also in reverse. The angle markings are carried foward to the edges. 2 vertical scale sare incorporated, running from 0 at the base, to 3.5cm.
Transparent polystyrene with ink studs, bevelled edges and removable grip.
16cm across the triangle base.
Part number 568 36.