Question

12. The sum of three angles of
a quadrilateral is 260 degree.
find the fourth angle.
O 80 degree
O 120 degree
O none of these
O 100 degree​

Answer 1

Answer:

it is of 100°

Step-by-step explanation:

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Answer 2

Answer:

100°

Step-by-step explanation:

Let the fourth angle be x

We know that sum of the angles of a quadrilateral is 360°.

ATQ-

      Sum of 3 angles + x = 360°

      260° + x = 360°

      x = (360-260)°

      x = 100°

∴ The fourth angle of the quadrilateral is 100°