Answer:
d = 90°
e = 41°
f = 139°
Explanation:
Angle d and the 90° angle are an adjacent pair of linear angles so their sum must add up to 180°
=> d + 90° = 180°
=> d = 180° - 90°
=> d = 90°
Angle e and the 41° angle are a vertically opposite angles formed at the intersection of two straight lines and therefore they must be equal
e = 41°
Angles 41° and f are a pair of linear adjacent angles whose sum = 180°
Therefore
41° + f° = 180°
=> f = 180° - 41°
=> f = 139°