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How to do six questions on page 54 of Beijing Normal University Edition A in the third grade math class? What is the side length of the square it surrounds?
Hello, landlord

First, you have to find the circumference of the square.

That is the length of the closed line.

Square perimeter formula

C=4a

So a = (1/4) c.

It's simple. You can do the math as I say.

I hope I can help you! !