The answer would be -18. Hope this helps!
B) 23
Add what you know together, 6 + 2 + 2 + 2 + 3.5. Fill in what you don’t by looking at other sides. 3.5 + 2 + 2.
The length of BC = 72
Solution:
Given ΔABC and ΔDEF are similar triangles.
ΔABC
ΔDEF
AB = 54, BC = n, EF = 12, DE = 9
Similar triangle theorem:
If two triangles are similar then the corresponding sides are proportional to each other.

Substitute the given values, we get

Do cross multiplication.

Divide both sides of the equation by 9.



⇒ BC = 72
Option B is the correct answer.
The length of BC = 72.
Answer:
its a reflection
Step-by-step explanation:
its a reflection across the y axis