Answer:
C
Step-by-step explanation:
Yes, ACD = BCD by AAS since they have 2 congruent angles & share a side.
x = 21
3x + 18 + 4x + 15 = 180
7x + 33 = 180
7x = 147
B
70-20=50
i don't sure correct or not
What is the question?