anesse03 anesse03

13-12-2020
Mathematics

contestada

What is m ZABC?
c=67 d=60

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

What is m ZABC c67 d60 mABC 60 mABC 67 mABC 120 mABC 127 class=

Respuesta :

unicorn3125 unicorn3125

14-12-2020

Answer:

m∠ABC = 127°

Step-by-step 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°

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