So if a line is 180° and we have 41° and 56° so far then follow,
41°+ 56° = 97°
180° - 97° = 83°
( Note: 41° is vertical to the other side and so is 56° )
The other angle is 83°.
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I hope that helps you out!!
Any more questions, please feel free to ask me and I will gladly help you out!!
~Zoey