Divide a circle into several parts evenly and form an approximate rectangle. The perimeter of the rectangle is 8 cm longer than that of the circle. What is the area of the circle______ Square centimeter

Divide a circle into several parts evenly and form an approximate rectangle. The perimeter of the rectangle is 8 cm longer than that of the circle. What is the area of the circle______ Square centimeter

The area of the circle is: 3.14 × (8 △ 2) 2, = 3.14 × 42, = 3.14 × 16, = 50.24 (square centimeter). Answer: the area of the circle is 50.24 square centimeter. So the answer is: 50.24

Divide a circle into 32 parts and form an approximate rectangle. The circumference of the rectangle is 8 cm longer than that of the circle. How many square centimeters is the area of the circle

The circumference of the rectangle is 8 cm longer than the circumference of the circle, which means the radius of the circle is 8 / 2 = 4
4*4*3.14

Divide a circle into several parts evenly and form an approximate rectangle. The perimeter of the rectangle is 8 cm longer than that of the circle. What is the area of the circle______ Square centimeter

The area of the circle is: 3.14 × (8 △ 2) 2, = 3.14 × 42, = 3.14 × 16, = 50.24 (square centimeter). Answer: the area of the circle is 50.24 square centimeter. So the answer is: 50.24

Put the circle together into an approximate rectangle. The length of the rectangle is 6.28 decimeters. The area of the circle is () square centimeters and the circumference is () meters
Pay attention to the unit!

Put the circle together into an approximate rectangle. The length of the rectangle is 6.28 decimeters. The area of the circle is (628) square centimeters and the circumference is (1.456) meters