Question

please answer fast I've a exam tomorrow ​

Answer 1

at the bottom linear pairs

70+a=180. 60+b=180

a=180-70. b=180-60

a=110. b=120

it's a pentagon

so,

30+X+X+a+b=540

30+2x+110+120=540

30+230+2x=540

2x+260=540

2x=540-260

2x=280

X= 280/2

X=140

hope this helps