Use a 25.12cm long wire to encircle a square. How many square centimeters is the area of the square? If you use this wire to encircle a circle, What is the area of this circle in square centimeter

Square area (25.12 / 4) ^ 2 = 39.44
Circle area (25.12 / 3.14 / 2) ^ 2 * 3.14 = 50.24

A piece of iron wire can just form a square with a side length of 4dm. If this piece of iron wire is used to encircle a 6dm rectangle, how large is its area?

4 × 4 / 2-6, = 16 / 2-6, = 8-6, = 2 (decimeter), 8 × 2 = 16 (square decimeter); answer: its area is 16 square decimeter

Use a piece of iron wire to encircle the following figures. The largest area is (). 1. Square 2. Rectangle 3. Regular triangle 4. Circle

Circle

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