Question

three angle of a quadrilateral are 100°, 90°, and 110°what is the fourth angle​

Answer 1

We know,
Sum of all four angles of a quadrilateral is 360 degrees

angle 1 + angle 2 + angle 3 + angle 4 = 360 degrees

We already know 3 angles ( 100, 90 and 110)
Thus, we have,

100 + 90 + 110 + angle 4 = 360 degrees
300 + angle 4 = 360 degrees
angle 4 = 360 - 300
angle 4 = 60 degrees


Thus, we find out angle 4 or the fourth angle to be 60 degrees!
:)

Answer 2

Answer:

60

Step-by-step explanation:

Let the fourth angle be x,

We know that,

x+110+90+100 = 360

300 + x = 360

x = 360 - 300

x = 60