Question

найдите длину окружности ,если ее диаметр равен 13 см (п=3,14) спасибо и вот еще одна найдите радиус и диаметр окружности ,если ее длина равна 63,428 (п=3,14) если можно то срешением СПАСИБО

Answer 1

1) L - длина окружности.

$L=\pi*d$

d=13 см

$L\approx 3,14*13$

$L\approx40,82$

 

2) $63,248=3,14*d$

 

$d=\frac{63,428}{3,14}$

d=20,2

r=d/2

r=10,1

Answer 2

Calculation of Circumference

To find the circumference of a circle, you can use the formula:

Circumference = π * Diameter

Given that the diameter of the circle is 13 cm and π is approximately 3.14, we can substitute these values into the formula to find the circumference.

Circumference = 3.14 * 13 cm

Calculating this, we get:

Circumference = 40.82 cm [[1]]

Therefore, the length of the circumference of the circle is approximately 40.82 cm.

Calculation of Radius and Diameter

To find the radius and diameter of a circle, you can use the formula:

Circumference = π * Diameter

Given that the circumference of the circle is 63.428 cm and π is approximately 3.14, we can rearrange the formula to solve for the diameter:

Diameter = Circumference / π

Substituting the given values, we have:

Diameter = 63.428 cm / 3.14

Calculating this, we get:

Diameter ≈ 20.2 cm [[2]]

To find the radius, we can use the formula:

Radius = Diameter / 2

Substituting the calculated diameter, we have:

Radius ≈ 20.2 cm / 2

Calculating this, we get:

Radius ≈ 10.1 cm [[2]]

Therefore, the diameter of the circle is approximately 20.2 cm and the radius is approximately 10.1 cm.

I hope this helps! Let me know if you have any further questions.