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Several math problems. 1. The area of a circle is 12.56 square centimeters, so what is the largest square area in the garden?
Solution: 1 The square of the radius of a circle is 12.56÷3. 14=4, because 2×2=4, the radius is 2 cm and the diameter is 4 cm;
The maximum area of a square in a circle is 4×2÷2×2=8 square centimeters.
2. The radius of chicken coop is 28.26 ÷ 3.14 = 9m;
The area of chicken coop is 3. 14×9? ÷ 2 =127.17m2.