Answer: The third choice
Step-by-step explanation:

Hope it helps <3
We sketch the two similar shapes and they are as shown in the attachment. We want to write corresponding side's length in ratio


Writing the two ratio as fraction gives

Cross multipliying gives
Answer: okay what do you need help with
Answer:
12
Step-by-step explanation:
1
2
3
4
5
6
7
8
9
10
11
12
1+2+3+4+5+6+7+8+9+10+11+12=78