Question

what is the fourth interior angle of the quadrilaterial if 82, 113, 51

Answer 1

angle sum property of a quadrilateral is 360

let the unknown angle be x.

82+113+51+x=360

246+x=360

x=360-246

x=114

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Answer 2

Angle a+ Angle b+ Angle c+ Angle d= 360'

Let the fourth angle be x.          

so, 82+113+51+x= 360'   =246+x= 360'        =x= 360 - 246

x= 114'

hence, fourth interior angle of quadrilateral is 114'