Question

Диаметр круга 12 (π ≈ 3). а) Найдите длину круга. б) Найдите площадь колеса.

Answer 1

Ответ:

Пошаговое объяснение:

а)12*3.14=37.68 см

б)3.14*144=452.16 см

Answer 2

Calculation of the Circumference and Area of a Circle

To find the circumference and area of a circle with a diameter of 12 (π ≈ 3), we can use the following formulas:

a) Circumference (C): The circumference of a circle is given by the formula C = πd, where d is the diameter of the circle.

b) Area (A): The area of a circle is given by the formula A = πr^2, where r is the radius of the circle.

Let's calculate the circumference and area of the circle using these formulas.

a) Circumference: The diameter of the circle is given as 12, so the radius (r) can be calculated by dividing the diameter by 2: r = d/2 = 12/2 = 6.

Now, we can calculate the circumference using the formula C = πd: C = π * 12 = 3 * 12 = 36.

Therefore, the circumference of the circle is 36.

b) Area: We already calculated the radius (r) as 6. Now, we can calculate the area using the formula A = πr^2: A = π * 6^2 = 3 * 6^2 = 3 * 36 = 108.

Therefore, the area of the circle is 108.

To summarize: a) The circumference of the circle is 36. b) The area of the circle is 108.

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