Question

1)Найди длину окружности, если её диаметр равен 25 см.Число П округли до десятых . помогите плиз

Answer 1

1) l=pi*d, где l - длина, d - диаметр. pi при округлении до десятых равно 3.1, тогда нужно найти произведение 25*3.1=77.5 см.

Answer 2

Calculating the Circumference of a Circle

To find the circumference of a circle when the diameter is given, we can use the formula:

C = π * D

Where: - C = Circumference - π (pi) is approximately 3.14 - D = Diameter

Given that the diameter is 25 cm, we can calculate the circumference using the formula.

Calculation

Using the formula C = π * D, where D = 25 cm and π is approximately 3.14, we can calculate the circumference:

C = 3.14 * 25 C ≈ 78.5 cm

So, the length of the circumference, rounded to the nearest tenth, is approximately 78.5 cm.