Simple method of mathematical hat

Fold the square paper pair into a triangle.

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Fold it again, press the crease, and then open it.

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Fold up the corners. The other side does the same thing.

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Fold one side of the folded small triangle into a triangle, and fold both sides equally.

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Fold an angle on the small triangle, both sides are the same.

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Fold up the triangle below, leaving a width of about one centimeter.

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Then fold the remaining one again and align it with the triangular edge above.

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Fold the back triangle to the back.

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Open it and the hat will be ready.

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Isn't it cute to wear it on a bear's head?

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