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Laabri

Ferris Wheel

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Last updated over 8 years ago
9 Nsɛmmisa

The toy ferris wheel has a radius of 13 inches pictured below:

The point C is the center of the wheel and a point P on the circle is chosen. After the ferris wheel has moved forward a distance of d, the point P moves to a new point on the circle, marked N.

A. Complete the table below, showing how the angle NCP varies with the distance d that the wheel has traveled forward:

Angle Measurements in Degrees:

1
1
1
1

B. Remember that one radian is the measure of the angle cut out by a one unit length arc on a circle with radius one unit so m(a) = 1 radian in the picture below:

1
1
1
1
1
Asemmisa {{asɛmmisaAhyɛnsode}}
1.

1 inch =

Asemmisa {{asɛmmisaAhyɛnsode}}
2.

10 inches =

Asemmisa {{asɛmmisaAhyɛnsode}}
3.

3 feet =

Asemmisa {{asɛmmisaAhyɛnsode}}
4.

7 feet =

More generally, a counterclockwise angle of r radians is the angle cut out by an arc of length r units on a unit circle.  Using this definition of radian angle measure, complete the table below, showing how the angle NCP varies with the distance d that the wheel has traveled forward:

Angle Measurements in Radians:

Asemmisa {{asɛmmisaAhyɛnsode}}
5.

1 inch =

Asemmisa {{asɛmmisaAhyɛnsode}}
6.

10 inches =

Asemmisa {{asɛmmisaAhyɛnsode}}
7.

3 feet =

Asemmisa {{asɛmmisaAhyɛnsode}}
8.

7 feet =

Asemmisa {{asɛmmisaAhyɛnsode}}
9.

C. What is the relationship between the measure of an angle in degrees and its measure in radians?