Answer:
118
Step-by-step explanation:
the length ED is equal to EC
so
the angle is also the same
that's mean the angle ECD is equal to 31
then to find the another angle just do like this
=180–31–31
=118
∠AEB = 118°
∠EDC = 31°
∠ECD = ∠EDC = 31°
ΔDEC = contains 180°
∠DEC = 180 - 31 - 31 = 118°
∠AEB = 118° because it is a vertical angle to ∠DEC
