Answer:
Solution given:
<1+57°=180°[ exterior angle is equal to the sum of two opposite interior angle of a triangle]
<1=180-57=123°
is your answer
Step-by-step explanation:
solution .
here ,
<1+57°= 180° [ being exterior angle ]
<X = 180° - 57°
<X=123°
hope it is helpful to you ☺️
