Question

triangleABC is congruent to triangleEDC by SAS. How do you know that the included angles ACB and DCE are congruent even though they are not marked?
Triangle ABC and Triangle EDC formed by lines AE intersecting line BD at point C. AC is congruent to EC. BC is congruent to DC.
A. Reflexive property
B. Symmetric property
C. Vertical angles are congruent
D. CPCTC

Answer 1

so it looks something like that

Answer 2

with those being congruent

Answer 3

Yes it does.

Answer 4

and what can u tell me about those two angles?