Respuesta :

Answer:

m∠ABU = 70°

Step-by-step explanation:

By applying angle addition postulate,

m∠ABC = m∠UBC + m∠ABU

145° = 75° + m∠ABU

m∠ABU = 145° - 75°

m∠ABU = 70°

Therefore, measure of angle ABU is 70°.