Take the vertex of the square as the center of the circle, and its side length as the radius to draw a circle. The known square area is 12 square centimeters, so it is urgent to find the area of the member! I don't know what root no root, please use primary school knowledge to answer!

Take the vertex of the square as the center of the circle, and its side length as the radius to draw a circle. The known square area is 12 square centimeters, so it is urgent to find the area of the member! I don't know what root no root, please use primary school knowledge to answer!

Well, you should understand after I change
The area of a square is equal to the square of the side length = 12
The area of a circle = the square of its radius
According to your topic, it is easy to know that the side length of a square is equal to the radius of a circle
So the area of the circle is π * 12 = 12 π