MethodWork in pairs. One of you draws any angle at all on a slip of paper, without measuring it and without telling the other what it is. Swap slips. Copy your partner angle onto your own page using compass and ruler. Then, and only then, both of you measure both angles with a protractor and compare.
Why the secrecy mattersIf you know the angle is 50 degrees you will be tempted to construct 50 degrees rather than copy it, and the whole point is lost. Not knowing forces you to trust the method. That is exactly the situation a carpenter is in with a roof angle that is not a round number.
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