Answer:
twelve faces
Step-by-step explanation:
12 sides
I don't know which one you want but here
Exact form: x=9/10
OR
Decimal form
x=0.9
D
is certainly wrong. You could extend the length of AD as far as you want and the two triangles (ABD and ACD) would still be congruent.
C
is wrong as well. The triangles might be similar, but they are more. They are congruent.
B
You don't have to prove that. It is given on the way the diagram is marked.
A
A is your answer. The two triangles are congruent by SAS
The answer to this question is A, 12. Hope this helps.
