Three angle of quadrilateral are 60°,85°and 130°. find the measure of the fourth angle.​

1 thought on “Three angle of quadrilateral are 60°,85°and 130°. find the measure of the fourth angle.​”

1. Given :-

   Three angles of quadrilateral 60° , 85° ,135° ,

   • let, the fourth angle be, x
   • x = 360°-(130°+85°+60°)
   • x =360°- 275°
   • x = 85°

   Reason:– Sum of all angles of a quadrilateral is 360°

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