Respuesta :

exspiravit

Answer:

B) 13°

Step-by-step explanation:

a right angle is 90°. Angle 2 is congruent to 77° so it is 77°. 90° minus 77° gives you the total of 13°. 13 + 77 = 90

mkrooska
The measurement of angle 1 is B) 13°

Explanation: 2=77° because it shares a vertex angle 1 and 2 equal 90°. So 90°-77°=13°