Question

If mzABD = 100° and mZDBC = 30°,
then mZABC = [? ]°

Answer 1

Answer:  130°

Step-by-step explanation:

∠ABD = 100° (given)

∠DBC = 30° (given)

Angle Addition Postulate states: ∠ABD + ∠DBC = ∠ABC

                                                         100°  +    30°  = ∠ABC

                                                                 130°        = ∠ABC

Answer 2

Answer:

130°

Step-by-step explanation:

Given: m<ABD=100° and m<DBC=30°

To find m<ABC, we must add up the two other angles.

100°+30°=130°

Hope this helped :D