Question

If 3 angles of a quadrilateral is added and the result 280 . Find the fourth angle.

Answer 1

Answer:

80°

Step-by-step explanation:

sum of three angles = 280°

sum of angles of a quadrilateral = 360°

sum of three angles + fourth angle = 360°

280° + fourth angle = 360°

fourth angle = 360° - 280°

fourth angle = 80°

$fourth \: angle \: = 80 degree$