Question

finnnnnnnnnnnnnndddddddddddddddd

Answer 1

x= 30
ʙᴇᴀᴄᴜꜱᴇ ᴀ+ʙ+ᴄ=180

Answer 2

$\huge \red{hey \: here \: ur \: ans}$
x+90°= 120°. { sum of two interior angle is equal to the opposite exterior angle}
x = 120-90
= 30°.

$\huge \green{thnks}$