Answer:
1st option
Step-by-step explanation:
ABC is a straight line
The 3 angles therefore sum to 180°
let l = k ( congruent angles ) , then
k + 126° + l = 180° , that is
2k + 126° = 180° ( subtract 126° from both sides )
2k = 54° ( divide both sides by 2 )
k = 27°
Then k = l = 27°
