Geometric tool e.g. set square, and arithmetic tool i.e. calculator, connecting device, has arithmetic tool with cylinder accommodating compass and fixation systems that are located on back surface of tool to fix set square and protector

摘要

The device has an arithmetic tool (1) with a cylinder accommodating a compass (11) and fixation systems that are located on a back surface of the tool to fix a set square (9) and a protector (10). The arithmetic tool processes and displays information sent by the compass, on a screen (2) i.e. LCD screen after receiving the information, where the information indicates a traced figure e.g. perimeter. The compass is presented in the form of a pen when the compass is not open.