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Answer:
120°
Step-by-step explanation:
We know that 80+80+80 ( the three acute angles ) +x ( the fourth angle )=360 ( the total of all angles in a quadrilateral) . Now we need to solve for x:
Simplify
240+x=360
Subtract 240 from both sides:
x= 120
This means that the fourth angle is 120°
Hope this helped
- Brooklyn
( PS, please mark this as the brainliest answer! )
Answer:
120 degree
Step-by-step explanation:
Three acute angles of 80 degree=80 degree* 3=240 degree
We know that, Total sum of angles =360 degree
Therefore,fourth angle=360-240 degree
=120 degree