Question

a quadrilateral has three angles equal to 80 degree find the measure of the fourth angle​

Answer 1

Answer:

120

Step-by-step explanation:

Angle sum property of quadrilateral is 360

Let other be x

Equation :

=> 80 + 80 + 80 + x = 360

=> 240 + x = 360

=> x = 360 - 240

=> x = 120

Hope it helps!!!!