To read an astrolabe, level the plum bob, the degree scale, the altitude, and the protractor.
This is a protractor. It helps you measure angles.
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Protractor
An angle ruler is a tool used to measuring angles like a protractor. An angle ruler is more accurate than a protractor.
A set-square.
Eh... Something, I don't really know.
A full protractor is is a protractor that goes 360 degrees around.
compass, and the astrolabe
Contractor rhymes with protractor.
No it is a semi circle. Something like a protractor
Yes it does. You are totally right.