A protractor
That tool is called a protractor.
The sextant.
A protractor.
To determine if the angle is < or> than 90 degrees so proper scale can be used
The purpose of measuring taper angle is to obtain taper angle
protractor
That tool is called a protractor.
Degrees
An angle ruler is a tool used to measuring angles like a protractor. An angle ruler is more accurate than a protractor.
Scoliometer-- A tool for measuring trunk asymmetry; it includes a bubble level and angle measure.
The sextant.
By measuring it using a suitable tool such as a ruler or caliper
A protractor.
To determine if the angle is < or> than 90 degrees so proper scale can be used
Protractor
An angle measuring more than 90 degrees is obtuse. An angle measuring less than 90 degrees is acute. An angle measuring 90 degrees is right.
A compass. This is not the same as a compass used to determine the direction of North.