Your question is unclear but one instrument for measuring angles is a protractor.
measuring jug! kettle
a protractor
degrees
There are many instruments for measuring speed but I am not aware of any for measuring velocity.
A protractor
Your question is unclear but one instrument for measuring angles is a protractor.
measuring jug! kettle
a protractor
there is special instrument named "angle distribution measuring system" for the divergence angle measurement of LEDs. my email: bkk2003@163.com
degrees
There are many instruments for measuring speed but I am not aware of any for measuring velocity.
A thermometer
A measuring flask.
universal bevel protactor is an angle measuring instrument which measures acute angle ,obtuse angle as well as it is used to layout an angle. its least count is 5 minute.
There are special angle-measuring instruments which you can use to measure the angle.
The two common measuring instruments used by carpenters are the tape measure and the T square. The tape measure is a metal ruler that reels out from a small hand held box. The T square is two rulers in one, set at a 90 degree angle.