Why have a protractor when your scale can do the trick? The Straight protractor merges the conventional scale with the angle protractor, allowing one piece of stationery to do both! The cool bit is that it still looks like a scale, allowing to fit easily into pencil boxes of all kinds!
The Straight Protractor is a winner of the Red Dot Award for the year 2015.
Designers: Chi Ningjun & Zhao Lishan.
( H/T: Yanko Design )