Question

a quadrilateral has three acute angles each measure is 80 degree what is the measure of fourth angle

I want in steps plz

Answer 1

Sum of angle of quadrilateral = 360

Let fourth angle x

If three angle are 80.

80+80+80+x = 360
240+x = 360
x = 360-240
x = 120

So the fourth angle is 120 degree

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