Question

Three interior angles of a quadrilateral are given find x (81°,145°,51°,x°)
80°
60°
71°
83°​

Answer 1

Step-by-step explanation:

Sum of all angles of any quadrilateral = 360°

A.T.Q. ---

81° + 145° + 51° + x° = 360°

277° + x° = 360°

{ Adding 81° + 145° + 51° = 277°}

x° = 360° - 277°

x° = 83°

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