The triangles below are similar.
What is the value of x?

Answer:
10
Step-by-step explanation:
Since EF=4, and BC=8, you can see the triangle increases by 2
So, 5*2=10
Answer:
10
Step-by-step explanation:
the answer being ten is because the smaller triangle is half the size of the bigger one.
ED is the same side as AB so multiply by 2. Because 8/4=2