Question

find the angle measure x in each following figures ​

Answer 1

Hi ! here is your answer :

80 + 90 + 90 + 3x + (180-x)= 540 (angle sum property of a polygon)

(x + angle 1 = 180 because they are linear. therefore, by transposition, angle 1 = 180 - x )

80 + 90 + 90 + 3x + 180 - x = 540

440 + 2 x = 540

2x = 540 - 440

x = 100/2

x= 50 ans.