Question

Someone help plsss :)))

Answer 1

Explanation:

solution .

here ,

<1+57°= 180° [ being exterior angle ]

<X = 180° - 57°

<X=123°

hope it is helpful to you ☺️

Answer 2

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