The radius of the small circle is twice that of the big circle, and the area of the big circle is 12 square centimeters more than that of the small circle. So how many square centimeters is the area of the small circle?

The radius of the small circle is twice that of the big circle, and the area of the big circle is 12 square centimeters more than that of the small circle. So how many square centimeters is the area of the small circle?

Why is the radius of small circle larger than that of big circle?
If the radius of the big circle is twice that of the small circle, its area is four times that of the small circle, and three times more is 12
That is to say, the area of the small circle is 4, and the area of the big circle is 16

The radius of the big circle is twice that of the small circle. The area of the big circle is 12 square centimeters more than that of the small circle. What is the area of the small circle?
Such as the title

R=2r,
S large-s small = 12,
∏*R^2-∏*r^2=12,
∏*4r^2-∏*r^2=12,
r=2√(1/∏),
The area of s small circle = Π * R ^ 2 = Π * (2 √ (1 / Π)) ^ 2 = 4,