Saw the largest circle on a square board with a side length of 20 cm. The area of the circle is______ Square centimeter. What's the rest of the leftover material______ Square centimeter

Saw the largest circle on a square board with a side length of 20 cm. The area of the circle is______ Square centimeter. What's the rest of the leftover material______ Square centimeter

3.14 × (20 △ 2) 2 = 3.14 × 10 × 10 = 314 (bisecting centimeter); 20 × 20-314, = 400-314, = 86 (bisecting centimeter); answer: the area of this circle is 314 square centimeter, and the remaining leftover material is 86 square centimeter

Saw the largest circle on a square board with a side length of 20 cm. What's the area of the circle and what's the remaining leftover material

The area of this circle = π (20 / 2) &# 178; = 100 π CM & # 178;
The remaining leftover material is 20-100 π = 400-314 = 86 cm-178;

On a square board with a circumference of 16 cm, saw off the largest circle. What is the area of the leftover material in square cm

16÷4=4㎝
The area of leftover material is 4 × 4 - π × (4 / 2) &# 178; = 16-4 π and# 178;

There is a square in a circle. The side length of the square is 10cm. What is the area of a circle without a square?

Is a square inscribed with a circle?
The side length of the square is 10cm, and the diameter of the circle is 10 * root 2cm
Circle minus square, area = circle area square area = (5 * radical 2) ^ 2 * π - 10 ^ 2 = 50 π - 100 ≈ 57 square centimeter