Cut the largest circle in a square paper with a side length of 10 cm. What is the area of the circle______ Square centimeter, it takes up half of the square area______ %.

Cut the largest circle in a square paper with a side length of 10 cm. What is the area of the circle______ Square centimeter, it takes up half of the square area______ %.

The area of circle s = π R2 = 3.14 × (10 △ 2) 2 = 78.5 (square centimeter); the area of square s = A2 = 10 × 10 = 100 (square centimeter); 78.5 △ 100 = 78.5%; so the answer is: 78.5, 78.5