Question

What is m ZABC?

c=67 d=60

mABC = 60°
mABC = 67 °
mABC = 120°
mABC = 127°​

Answer 1

m∠ABC = 127°

Explanation:

From triangle BCD:

m∠BCD + m∠CDB + m∠DBC = 180°

67° + 60° + m∠DBC = 180°

m∠DBC = 180° - 127°

An angle ABD is straight angle, so:

m∠ABC + m∠DBC = 180°

m∠ABC + 180° - 127° = 180°

m∠ABC = 127°