Question

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

Answer 1

Step-by-step explanation:

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Answer 2

Answer:

85°

Step-by-step explanation:

Let the fourth angle be x

Total measure of the quadrilateral= 360°

60°+85°+130°+x = 360°

275°+x = 360°

x = 360°–275°

x= 85°

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