• Allero@lemmy.today
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    1 month ago

    It is necessary. In the left triangle, the angle that is shown to be right is actually 80°, since other angles are 60 and 40, totaling 100.

      • pyre@lemmy.world
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        1 month ago

        that’s on purpose. it checks whether you actually verify information out just make assumptions. you’re not supposed to eyeball things.