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학생 지침
Click 
Click on the 
to play ''Estimating Angles"
Estimate the size of the given angles to within five degrees of their actual value.
Now, 
a screeshot of your completed results/timings.
Press 
선생님 메모 (학생들에게는 보이지 않음)
https://www.transum.org/software/SW/Starter_of_the_day/Students/Angles.asp
