Question

The sum of the measures of three angles in a quadrilateral is 280 whats the measure of the fourth angle???

Answer 1

The measure of the fourth angle in the quadrilateral is 100 degrees. (360 - 280 = 80, 180 - 80 = 100)

Answer 2

Answer: the measure of the fourth angle is 80 degrees.

Step-by-step explanation: Let x be the fourth angle's measure in degrees.

x + (angle 1) + (angle 2) + (angle 3) = 360. We can substitute 280 for the sum of the other three angles:

x + 280 = 360. Subtraction of 280 results in

x = 80.