Answer:
They are similar.
Step-by-step explanation:
123 + 36 + x = 180
159 + x = 180
(159 - 159) + x = 180 - 159
x = 21
36 + 21 + x = 180
57 + x = 180
(57 - 57) + x = 180 - 57
x = 123
CDE = 123 + 36 + 21
ABC = 123 + 36 + 21
