The minute hand of a certain clock is 10 centimeters long, and from 1 o clock to 2 o clock, how many

The minute hand of a certain clock is 10 centimeters long, and from 1 o'clock to 2 o'clock, the tip of the minute hand has traveled by centimeters.

Analysis:

From 1 o'clock to 2 o'clock, exactly one clock, it is known that 1 hour = 60 minutes. The minute hand of the clock has traveled for 60 minutes, 360°, which is exactly a circle, and the distance traveled by the tip of the minute hand is the circumference of the circle with the length of the minute hand as the radius.

Assuming that the minute hand length is r, the formula for the circumference of the circle is known.

c=2*π*r。Now R is the clock minute hand length of 10 centimeters, where take, substitute the formula to obtain the circumference of the circle C = 2 *, the solution of C = cm, is the minute hand length of 10 cm clock, from 1 o'clock to 2 o'clock, the minute hand tip has traveled the distance.

The minute hand of the clock is 10 cm long. From 1 o'clock to 2 o'clock, the minute hand travels exactly one turn.

So: the tip of the minute hand has traveled through the centimeter.

That is, the perimeter is calculated, *10*2=

The minute hand is 10 centimeters long and the radius should be less than 10 centimeters, so the tip of the needle should be less than centimeters.

Walking from one o'clock to two o'clock means that the minute hand has gone around once, and the circumference of the circle = 2 r (r is the radius), and the result is approximately equal to.

When the minute hand goes from 1 to 2, the circumference of the circle is divided by 12, which is approximately equal to.

The minute hand of a certain clock is 10 centimeters long, and from 1 o'clock to 2 o'clock, how many centimeters has the tip of the minute hand traveledCentimeter.

This is the circumference of the circle, why divide by 12

From 1 o'clock to 2 o'clock, the minute needle pointed rock cover walked 360 degrees, just one circle.

Walk in length 2 cm.

From 1 to 2 minutes, the minute hand just turned around to accompany Yu Defeat.

It is equivalent to finding the circumference of a circle with a diameter of 10 centimeters, which is:

2 10 cm.

The minute hand goes from 1 minute to 2 minutes and actually turns 1 round. Centimeter.

1.Passage = 10 2 cm.

2.Area=10 10 square centimeters.

1 hour is 1 lap.

So went centimeters.

The area is a square centimeter.

The tip of the minute hand has passed.

From 1 o'clock to 2 o'clock, the area swept by the minute hand is:

Walk 1 lap in 1 hour, so just ask for the circumference.

Answer: The tip of the minute hand has traveled past centimeters.

After 1 hour, the minute hand has exactly gone around a circle. The circumference of this circumference is 2 r=20 (cm).

The area swept by the minute hand is exactly the area of a circle, = r = 100 (square centimeters).

The circumference of a circle is 2 r=20 (cm).

The area swept by the minute hand is exactly the area of a circle, = r = 100 (square centimeters).