They are similar since all three inside angles for each triangle would be the same.
Answer:
12 
Step-by-step explanation:
8 divided by two-thirds of x is
⇒ 8/2/3 × 
⇒ 8 × (3/2)
⇒ 8×3
/ 2
⇒ 24
/ 2
∴ 12 
1/3(12x-24)=16
3/1[1/3(12x-24)=16]
12x-24=48
+24 +24
12x=72
12x/12=72/12
X=6
Let's calculate each area.
4 m:
We need to divide it by 2 to find the radius.
4÷2=2
Now let's put it in the formula.
2²π
4π=12.5663706≈13
6 m:
We need to divide it by 2 for the radius.
6÷2=3
Now put it in the formula.
3²π
9π=28.2743≈28
Now subtract 13 from 28.
28-13=15
So, the difference between their area is 15 m².