Well Done!
Reset
ΔCED ≅ ΔAEB by
?
Postulate.
So ∠CED ≅ ∠AEB by
?
.
m∠CED = mARC
?
and
m∠AEB = m ARC
?
because the measure of
?
angles equals the measure of their
?
arcs.
So m
= m
because of
?
.
∴
≅
intercepted
SSS
CPCTC
substitution
CD
central
AB