What Precautions Should Be Taken While Using Sine Bars?
What Precautions Should Be Taken While Using Sine Bars? Precautions in use of sine bars. What is a protractor used for? Geometry Why is it called a protractor? protractor (n.) 1610s, “one who lengthens (an action),” Modern Latin agent noun from Latin protrahere “to draw forward” (see protraction). Medieval Latin protractor meant “one who calls