Question

Find the unknown angles. Please include the reasons as well. ​

Answer 1

Step-by-step explanation:

sum of all angles of quadrilateral =360

90+105+x+2x=360

3x=165

x=55

Answer 2

Step-by-step explanation:

sum of all angles of quadrilateral =360 degrees

therefore ,90 +105+2x+x=195

3x = 195

x = 195/3

x = 65

therefore 2x= 2×65= 130degrees

x= 65 degrees