Answer:
61°
Step-by-step explanation:
let the angle on a straight line with 112° be x
112°+x = 180° ( angles on a straight line)
x = 180°- 112°
x = 68°
calculating for k°
68°+ k +51° = 180° (sum of angles Ina triangle equal 180°)
119° +k = 180°
K = 180-119
k = 61°
