Protractor - T square
Protractor - T square for measuring angles
This device give very accurate measurements of angels and could be set to a specific angle if needed. It is similar in function to T-squares used today in engineering and drafting except for the braille indicators on the protractor.
This device give very accurate measurements of angels and could be set to a specific angle if needed. It is similar in function to T-squares used today in engineering and drafting except for the braille indicators on the protractor.
