Answer: b) 65°
Step-by-step explanation:
triangles always equal 180°
from the given information, these two triangles appear to be congruent. therefore, the angle that is 29° in the left triangle should apply to the triangle on the right.
so 29° + 86° = 155
180 - 155 = 65
the missing angle is 65°
hope this helps :)
