Question

find the angle measure X in the following figures​

Answer 1

Answer:

80°

Step-by-step explanation:

Sum of all angles in a quadrilateral = 360°

let the required angle be x

In this case,

(100+140+40+x)° = 360°

(280+x)°=360°

x=(360-280)°

x=80°

Answer 2

angle 1= 100

angle 2= 40

angle 3 = 140

angle 4 = x

as a figure is a quad so the sum of all the angles of a quad is 360

so....100+140+40+x= 360

280+x=360

x=360-280

x= 80

therefore the 4th angle is 80 degrees

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