Question

the measure of three angle of a quadrilateral are 60 degree, 70 degree and 80 degree then find the measure of the fourth angle of the quadrilateral​

Answer 1

Answer:

150

Step-by-step explanation:

Let the fourth angle is X.

60+70+80+X=360

210+X=360

X=360_210

X= 150

Answer 2

Step-by-step explanation:

Given - In quadrilateral ,

60°,70°,80° are the three angle

To find- the fourth angle

solution - let the fourth angle be x

60 + 70 + 80 + x = 360 .... sum of all angles of quadrilateral

210 + x = 360

x = 360 - 210

x = 150 °

Answer : measure of fourth angle is 150°