Question

a quadrilateral has three acute angles each measure 75 find the measure of the forth angle

Answer 1

in. quadrilateral sum of angles =360
75+75+75+x=360
225+x=360
360-225=x
135=x

Answer 2

$75 + 75 + 75 + x = 360 \\ 225 + x = 360 \\ 360 - 225 = x \\ x = 135$
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