A protractor is used to draw and measure angles. An angle is the amount of turn between two lines. Angles are measured in degrees with the symbol °. Angles can be labelled with 3 letters (eg DEF) to ...

Old school vernier calipers served engineers and machinists well for a long time — and did a perfectly good job. Digital models then came along and were easier to read. They now rule the roost, ...

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WEBVTT 3 NEW AT 5:30-- A MATH MYSTERY IN PITTSBURGH-- IS BACK!! REMEMBER THESE? PROTRACTORS-- USED TO MEASURE ANGLES-- GLUED ALL OVER THE CITY! YOU REALLY DON'T NOTICE THEM UNTIL SOMEONE POINTS THEM ...