A compass. This is not the same as a compass used to determine the direction of North.
a syring is the tool for mesuring mass.
Either an obtuse angle or a reflex angle.
a syring is the tool for mesuring mass.
A protractor
Is called an obtuse angle.
protractor
A protractor.
Protractor
A tape measure, or a measuring pole.
The value of the relief (and rake) angle effects how the tool cuts into a particular material and the type or size of chip produced. For short: relief angle determines how deep and how rough the tool bites.
rake angle
That tool is called a protractor.