How to use protractor. Why 0 is written 2 times in a protractor and what does it mean.
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A protractor has two sets of numbers: one set goes from 0 to 180, the other set from 180 to 0. ... In the examples above we lined up the one side of the angle with the zero of the lower set of numbers, so we need to read the lower set of numbers.
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https://www.cuemath.com/geometry/protractor/
This is the website link you can find all your answers there.
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