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Thank you for coming to Brainly with your questions!

I believe the answer is: 

93 degrees. You were correct. The interior angles all add up to 360, so you subtract each given angle to find the missing angle.

I hope this helps you! Please mark Brainliest! Let me know if I can help you with any further questions!

-Belle
the formula to find the total angle measure in an irregular polygon is (n-2)*180 where n is the number of sides it has; In your case, 4, so:
(4-2)*180
2*180
360 total degrees

Since you already know 3 of the angles, just add them all together and subtract that from 180 to find the final angle.
132+79+56=267
360-267=93 degrees for the final unknown angle.
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