Question

Автомобиль объезжает город по кольцевой дороге. определить длину объезда , если она составляет половину окружности радиусом r

Answer 1

Всего длина окружности составляет 2пr, а половина - пr

Answer 2

Calculating the Length of the Bypass

To determine the length of the bypass, which constitutes half the circumference of a circle with a radius of r, we can use the formula for the circumference of a circle, which is given by:

C = 2 * π * r

Where: - C is the circumference - π is a constant approximately equal to 3.14159 - r is the radius of the circle

Since the bypass constitutes half the circumference, the length of the bypass can be calculated as:

Length of Bypass = 0.5 * C

Substituting the value of C from the formula for the circumference, we get:

Length of Bypass = 0.5 * 2 * π * r

Simplifying further, we find:

Length of Bypass = π * r

So, the length of the bypass is equal to π * r.

Conclusion

Therefore, the length of the bypass when it constitutes half the circumference of a circle with a radius of r is π * r.