Question

Diagram, line bc is parallel to de. i.e bc de abc = 42 cab = 109 find falls

Answer 1

x = 29°

Explanation:

Since line BC is parallel to line DE, therefore:

m<BAD = 42° (alternate interior angles are congruent)

m<BAD + m<BAC + x = 180° (angles on a straight line)

42° + 109° + x = 180° (substitution)

151° + x = 180°

Subtract 151 from each side

x = 180 - 151

x = 29°