the minimum accuracy of the angle is 1 degree, each 10 degrees have a clear line to distinguish Clear and good quality: the protractor made of good quality plastic; Clear color allow you see the ...

A protractor is used to draw and measure angles ... A quarter turn is 90° and is called a right angle. A half turn is 180° and is known as a straight angle (or angle on a straight line).

Who knew you had a protractor in your toolbox all along ... The square is fundamentally a right triangle (with angles of 90°, 45°, and 45°), and can be used both to mark and verify squareness ...