How do you construct a 125 degree angle using a ruler and a compass? Also is it possible to construct a 80 degree angle using a ruler and compass?

Can anyone please help me out? Tomorrow is my Math exam!

The angle measuring 130º and 80º cannot be constructed using a ruler and compass. They can be constructed using a protractor. 

The angles measuring 30º, 45º, 60º, 75º, 90º, 120º, 135º, 150º, 180º and their bisectors can be constructed using the compass. The bisectors of the angles so formed can also be constructed using the compass.

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These Angles are not possible to be constructed by a ruler or compasses.

Only those angles whose measure is divisible by 15 can be constructed by ruler and compasses and their bisectors.

So these measures are cannot be constructed as they are not divisible by 15.

Thumbs up please

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